Sumatra

Region and island in western Indonesia

For other uses, see Sumatra (disambiguation).

Sumatra

Topography of Sumatra

Location of Sumatra within the Indonesian Archipelago

Geography
Location| Southeast Asia
Coordinates| 00°N 102°E﻿ / ﻿0°N 102°E﻿ / 0; 102
Archipelago| Indonesian Archipelago

* * *

Greater Sunda Islands
Area| 482,286.55 km2 (186,211.88 sq mi)
Highest elevation| 3,805 m (12484 ft)
Highest point| Kerinci
Administration

Indonesia

Provinces| Aceh
North Sumatra
West Sumatra
Riau
Riau Islands
Jambi
Bengkulu
South Sumatra
Lampung
Bangka Belitung
Largest settlement| Medan (pop. 2,097,610)
Demographics
Population| 60,795,669 (mid 2023 estimate)
Pop. density| 126/km2 (326/sq mi)
Ethnic groups| Acehnese, Batak, Gayonese, Lampung, Malay, Mentawai, Minangkabau, Nias, Palembang, Rejang, Chinese, Indian, Javanese, Sundanese etc.
Additional information
Time zone|

* Indonesia Western Time (UTC+7)

Sumatra[a] (/sʊˈmɑːtrə/) is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 482,286.55 km2 (182,812 mi.2), including adjacent islands such as the Simeulue, Nias, Mentawai, Enggano, Riau Islands, Bangka Belitung and Krakatoa archipelago.

Sumatra is an elongated landmass spanning a diagonal northwest–southeast axis. The Indian Ocean borders the northwest, west, and southwest coasts of Sumatra, with the island chain of Simeulue, Nias, Mentawai, and Enggano off the western coast. In the northeast, the narrow Strait of Malacca separates the island from the Malay Peninsula, which is an extension of the Eurasian continent. In the southeast, the narrow Sunda Strait, containing the Krakatoa archipelago, separates Sumatra from Java. The northern tip of Sumatra is near the Andaman Islands, while off the southeastern coast lie the islands of Bangka and Belitung, Karimata Strait and the Java Sea. The Bukit Barisan mountains, which contain several active volcanoes, form the backbone of the island, while the northeastern area contains large plains and lowlands with swamps, mangrove forest and complex river systems. The equator crosses the island at its centre in West Sumatra and Riau provinces. The climate of the island is tropical, hot, and humid. Lush tropical rain forest once dominated the landscape.

Sumatra has a wide range of plant and animal species but has lost almost 50% of its tropical rainforest in the last 35 years.[clarification needed] Many species are now critically endangered, such as the Sumatran ground cuckoo, the Sumatran tiger, the Sumatran elephant, the Sumatran rhinoceros, and the Sumatran orangutan. Deforestation on the island has also resulted in serious seasonal smoke haze over neighbouring countries, such as the 2013 Southeast Asian haze which caused considerable tensions between Indonesia and affected countries Malaysia and Singapore.[2] The widespread deforestation and other environmental destruction in Sumatra and other parts of Indonesia has often been described by academics as an ecocide.[3][4][5][6][7]

## Etymology

[edit]

Before it was known as Sumatra, the region was referred to as Melayu (also known as Malay in English), named after the ancient Melayu Kingdom based in Jambi. The name Melayu appeared in early historical records, including inscriptions and Chinese chronicles, before being replaced by Sumatra in the 14th century.[8]

Sumatra was known in ancient times by the Sanskrit names of Svarṇadvīpa ('Island of Gold') and Svarṇabhūmi ('Land of Gold'), because of the gold deposits in the island's highlands.[9] The earliest known mention of the current form "Sumatra" was in 1017, when the local king Haji Sumatrabhumi ("king of the land of Sumatra")[10] sent an envoy to China. Arab geographers referred to the island as Lamri (Lamuri, Lambri or Ramni) in the tenth through thirteenth centuries, in reference to a kingdom near modern-day Banda Aceh which was the first landfall for traders. The island has also been known by other names, including Andalas[11] or Percha Island.[12] Scholars suggest that mention of Suwarnadwipa in the Hindu Epic the Ramayana may be a reference to Sumatra. According to experts on The Ramayana, the epic is one of the first sources to document the relationship between India and the Indonesian archipelago.[13]

In the late 13th century, Marco Polo referred to the kingdom as Samara, while his contemporary fellow Italian traveller Odoric of Pordenone used the form Sumoltra. Later in the 14th century the local form "Sumatra" became popular abroad due to the rising power of the kingdom of Samudera Pasai and the subsequent Sultanate of Aceh.[14][15]

From then on, subsequent European writers mostly used Sumatra or similar forms of the name for the entire island.[16][17]

## History

[edit]

Muaro Jambi Temple Compounds, built by the Melayu Kingdom, is one of the largest and best-preserved ancient temple complexes in South East Asia.

By the year 692, the Melayu Kingdom was absorbed by Srivijaya.[18]: 79–80 Srivijaya's influence waned in the 11th century, specifically in the year 1025, after suffering defeat at the hands of the Chola Empire in southern India[19] By the end of the 12th century, Srivijaya had been reduced to a kingdom, and its dominant role in South Sumatra ended with the last king, Ratu Sekekhummong, who founded the milestone of Kepaksian Sekala Brak in the 13th century AD with the Dalom building.[19][20] At the same time, the spread of Islam in Indonesia occurred gradually and indirectly, starting from the western regions such as the Sumatra area which became the first place for the spread of Islam in the archipelago, then Java, then to the eastern regions of Indonesia, Sulawesi and Maluku.[21] The island of Sumatra is also an area in the archipelago that received the spread of Islam first compared to other islands or other areas.[21] The island of Sumatra became the first area to receive the spread of Islam because of the position of the island of Sumatra which is close to the Malacca strait.[21] The initial process of Islamization related to trade and also the formation of the kingdom.[21] Islam entered Sumatra through pious Arabs and Tamil traders in the 6th and 7th centuries AD.[22][23][24] At the beginning and end of the 13th century the formation of the kingdom, the king of the Samudra kingdom had converted to Islam. Marco Polo visited the island in 1292, and his fellow Italian Odoric of Pordenone in 1321.[citation needed]

Baiturrahman Grand Mosque in Banda Aceh

Aceh in the north of Sumatra became known in the 16th century as trading centre for the pepper trade by shipping quality piperaceae (pepper). Aceh became the main commercial centre of the Aceh Sultanate and trading routes were established to the Mediterranean via the Red Sea to rival the Portuguese shipping lanes. The reign of Iskandar Muda is known as the golden age of Sumatra because he extended the cultural influence of the Aceh Sultanate to Padang and Johor.[25] The Aceh Sultanate sustained the rivalry with the Johor sultanate, the Dutch, and the Portuguese throughout the 16th and 17th century. When the Dutch were weakened in the 18th century the British empire began to actively intervene in Aceh, establishing close relations between Banda Aceh and Penang. In the 17th and 18th century the Aceh Sultanate battled the Siak sultanate in the south of Sumatra. The port city of Banda Aceh was recorded in European historical writings since the 13th century. In terms of economic development the port of Banda Aceh only started to face competition in the 18th century when more ports were constructed in Sumatra for maritime transport. Nevertheless, major pepper suppliers used the port of Banda Aceh at the beginning of the 19th century. The port in Medan grew swiftly in the late 19th and early 20th century. Meanwhile the medium sized port of Palembang faced a stiff economic decline as the heritage of the Srivijaya empire was superseded by the economic policy of the Singhasari and Majapahit. The Palembang sultanate experienced a terminal decline in the early 19th century.[26]

With the coming of the Dutch Empire, the many Sumatran princely states gradually fell under their control. Aceh posed major obstacles, as the Dutch were involved in the long and costly Aceh War (1873–1903).

During the Second World War, Japan invaded Sumatra in 1942.

The Free Aceh Movement fought against Indonesian government forces in the Aceh Insurgency from 1976 to 2005.[27] Security crackdowns in 2001 and 2002 resulted in several thousand civilian deaths.[28]

The island was heavily impacted by both the 1883 Krakatoa eruption and the 2004 Boxing Day Tsunami.

## Demographics

[edit]

Historical populationYear| Pop.| ±%

|
|

1971 | 20,808,148| —
1980 | 28,016,160| +34.6%
1990 | 36,506,703| +30.3%
1995 | 40,830,334| +11.8%
2000 | 42,616,164| +4.4%
2005 | 45,839,041| +7.6%
2010 | 50,613,947| +10.4%
2015 | 55,198,752| +9.1%
2020 | 58,557,211| +6.1%
2023 | 60,795,669| +3.8%
sources:[29][30]

Sumatra's population as of 2023 was estimated to be about 60,795,669 ;[30] it has about the same number of inhabitants as South Africa, making it the fifth-most populous island in the world. Yet because it is such a large island, it is not densely populated: it has an average of about 126 people per km2.[31]

* Minangkabau women carrying platters of food to a ceremony

* Traditional house in Simalungun North Sumatra

## Ethnic groups

[edit]

The largest indigenous ethnic groups in Sumatra are Malays, Minangkabaus, Bataks, Acehnese, and Lampungs. Other major non-indigenous ethnic groups are Javanese, Sundanese, and Chinese.

Below are 11 largest ethnic groups in Sumatra based on the 2010 census (including Riau Islands, Bangka Belitung, Nias, Mentawai, Simeulue and islands around it)[32]

Ethnic groups  | Population

|

Javanese | 15,239,275
Bataks | 7,302,330
Minangkabau | 5,799,001
Ethnic groups from South Sumatera  | 4,826,272
Malays | 4,016,182
Ethnic groups from Aceh  | 3,991,883
Ethnic groups from Jambi  | 1,379,351
Sundanese | 1,231,888
Ethnic groups from Lampung  | 1,109,601
Nias | 1,021,267
Other  | 2,086,804

### Languages

[edit]

Speakers of Acehnese. Kedukan Bukit Inscription, using Pallava alphabet, is the oldest surviving specimen of the Old Malay language in South Sumatra, Indonesia.

There are over 52 languages spoken, all of which (except Chinese and Tamil) belong to the Malayo-Polynesian branch of the Austronesian language family. Within Malayo-Polynesian, they are divided into several sub-branches: Chamic (which are represented by Acehnese in which its closest relatives are languages spoken by Ethnic Chams in Cambodia and Vietnam), Malayic (Malay, Minangkabau and other closely related languages), Northwest Sumatra–Barrier Islands (Batak languages, Gayo and others), Lampungic (includes Proper Lampung and Komering) and Bornean (represented by Rejang in which its closest linguistic relatives are Bukar Sadong and Land Dayak spoken in West Kalimantan and Sarawak (Malaysia)). Northwest Sumatra–Barrier Islands and Lampungic branches are endemic to the island. Like all parts of Indonesia, Indonesian (which was based on Riau Malay) is the official language and the main lingua franca. Although Sumatra has its own local lingua franca, variants of Malay like Medan Malay and Palembang Malay[33] are popular in North and South Sumatra, especially in urban areas. Minangkabau (Padang dialect)[34] is popular in West Sumatra, some parts of North Sumatra, Bengkulu, Jambi and Riau (especially in Pekanbaru and areas bordered with West Sumatra) while Acehnese is also used as an inter-ethnic means of communication in some parts of Aceh province.

### Religion

[edit]

Religions | Total

|

Islam | 53,409,001
Protestantism | 5,592,010
Roman Catholicism | 1,023,603
Buddhism | 832,415
Hinduism | 193,917
Confucianism | 37,214
Aliran Kepercayaan | 10,893
Overall | 61,099,053

[35]

Religion in Sumatra (2023)[35]

1. Islam (87.41%)
2. Protestantism (9.15%)
3. Roman Catholic (1.68%)
4. Buddhism (1.36%)
5. Hinduism (0.32%)
6. Confucianism (0.061%)
7. Folk religion (0.02%)

The majority of people in Sumatra are Muslims (87.12%), while 10.69% are Christians, and less than 2.19% are Buddhists and Hindus.[36] Sumatra’s diverse Muslim communities coexist with various ethnic and religious groups, reflecting the region’s broader tradition of religious tolerance and social cohesion.[37]

## Administration

[edit]

Sumatra is one of seven geographical regions of Indonesia, which includes its adjacent smaller islands. Sumatra was one of the eight original provinces of Indonesia between 1945 and 1948. Including adjacent archipelagoes normally included with Sumatra (such as the Riau Islands, Nias and the Bangka-Belitung group), it now covers ten of Indonesia's 38 provinces, which are set out below with their areas and populations.[38]

Provinces within the region of Sumatra  Name | Map | Area (km2) | Population
census
2000 | Population
census
2010 | Population
census
2015 | Population
census
2020 | Population
estimate
2023 | Capital

|
|
|
|
|
|
|
|

Aceh |  | 58,485.90 | 4,073,006 | 4,486,570 | 4,993,385 | 5,274,871 | 5,512,219 | Banda Aceh

North Sumatra |  | 72,460.74 | 11,642,488 | 12,326,678 | 13,923,262 | 14,799,361 | 15,386,640 | Medan

West Sumatra |  | 42,119.54 | 4,248,515 | 4,846,909 | 5,190,577 | 5,534,472 | 5,757,210 | Padang

Riau |  | 89,935.90 | 3,907,763 | 5,543,031 | 6,330,941 | 6,394,097 | 6,642,874 | Pekanbaru

Riau Islands |  | 8,269.71 | 1,040,207 | 1,685,698 | 1,968,313 | 2,064,564 | 2,162,140 | Tanjung Pinang

Jambi |  | 49,026.58 | 2,407,166 | 3,088,618 | 3,397,164 | 3,548,228 | 3,679,169 | Jambi

South Sumatra |  | 91,592.43 | 6,210,800 | 7,446,401 | 8,043,042 | 8,467,432 | 8,743,522 | Palembang

Bengkulu |  | 20,130.21 | 1,455,500 | 1,713,393 | 1,872,136 | 2,010,670 | 2,086,006 | Bengkulu

Lampung |  | 33,575.41 | 6,730,751 | 7,596,115 | 8,109,601 | 9,007,848 | 9,313,990 | Bandar Lampung

Bangka Belitung |  | 16,690.13 | 899,968 | 1,223,048 | 1,370,331 | 1,455,678 | 1,511,899 | Pangkal Pinang
Totals |  | 482,286.55 | 42,616,164 | 50,613,947 | 55,198,752 | 58,557,211 | 60,795,669

## Geography

[edit]

Map of geological formation of Sumatra island Mount Sinabung, North Sumatra

The longest axis of the island runs approximately 1,790 km (1,110 mi) northwest–southeast, crossing the equator near the centre. At its widest point, the island spans 435 km (270 mi). The interior of the island is dominated by two geographical regions: the Barisan Mountains in the west and swampy plains in the east. Sumatra is the closest Indonesian island to mainland Asia.

To the southeast is Java, separated by the Sunda Strait. To the north is the Malay Peninsula (located on the Asian mainland), separated by the Strait of Malacca. To the east is Borneo, across the Karimata Strait. West of the island is the Indian Ocean.

Sumatra is a highly seismic island. The Great Sumatran fault (a strike-slip fault), and the Sunda megathrust (a subduction zone), run the entire length of the island along its west coast. Huge earthquakes have been recorded throughout history. In 1797, an 8.9 earthquake shook Western Sumatra, and in 1833, a 9.2 earthquake shook Bengkulu and Western Sumatra. Both events caused large tsunamis. Earthquakes are very common throughout the coastal area of the west and center of the island, and tsunamis are common due to the high seismicity in the area.[39][40]

On 26 December 2004, the western coast and islands of Sumatra, particularly Aceh province, were struck by a tsunami following the Indian Ocean earthquake. This was the longest earthquake recorded, lasting between 500 and 600 seconds (8.33–10 minutes).[41] More than 170,000 Indonesians were killed, primarily in Aceh. Other recent earthquakes to strike Sumatra include the 2005 Nias–Simeulue earthquake and the 2010 Mentawai earthquake and tsunami.

Lake Toba is the site of a supervolcanic eruption that occurred around 74,000 years ago, representing a climate-changing event.[42] The most important rivers in Sumatra belong to the catchment area of the South China Sea. Heading north to south, the Asahan, Rokan, Siak, Kampar, Indragiri, Batanghari flow into the Malacca Strait, while the island's largest river, the Musi, flows into the sea at Bangka Strait in the south. To the east, big rivers carry silt from the mountains, forming the vast lowland interspersed by swamps. Even if mostly unsuitable for farming, the area is currently of great economic importance for Indonesia. It produces oil from both above and below the soil – palm oil and petroleum.

Sumatra is the largest producer of Indonesian coffee. Small-holders grow Arabica coffee (Coffea arabica) in the highlands, while Robusta (Coffea canephora) is found in the lowlands. Arabica coffee from the regions of Gayo, Lintong and Sidikilang is typically processed using the Giling Basah (wet hulling) technique, which gives it a heavy body and low acidity.[43]

Medan, the largest city in Sumatra

By population, Medan is the largest city in Sumatra.[44] Medan is also the most visited and developed city in Sumatra.

## Largest cities

[edit]

Rank  | City  | Province  | City Birthday  | Area
(in km2)  | Population
2010 census  | Population
2020 census

|
|
|
|
|
|

1  | Medan | North Sumatra | 1 July 1590  | 265.10  | 2,097,610  | 2,435,252
2  | Palembang | South Sumatra | 17 June 683  | 400.61  | 1,455,284  | 1,668,848
3  | Bandar Lampung | Lampung | 17 June 1682  | 169.21  | 881,801  | 1,166,066
4  | Pekanbaru | Riau | 23 June 1784  | 633.01  | 897,767  | 983,356
5  | Padang | West Sumatra | 7 August 1669  | 694.96  | 833,562  | 909,040
6  | Jambi | Jambi | 17 May 1946  | 205.00  | 531,857  | 606,200
7  | Bengkulu | Bengkulu | 18 March 1719  | 144.52  | 308,544  | 373,591
8  | Dumai | Riau | 20 April 1999  | 2,039.35  | 253,803  | 316,782
9  | Binjai | North Sumatra |  | 90.24  | 246,154  | 291,842
10  | Pematang Siantar | North Sumatra | 24 April 1871  | 60.52  | 234,698  | 268,254
11  | Banda Aceh | Aceh | 22 April 1205  | 61.36  | 223,446  | 252,899
12  | Lubuklinggau | South Sumatra | 17 August 2001  | 419.80  | 201,308  | 234,166

## Flora and fauna

[edit]

See also: List of national parks of Indonesia and List of amphibians of Sumatra

Sumatran tiger Rafflesia arnoldii

Sumatra supports a wide range of vegetation types that are home to a rich variety of species, including 17 endemic genera of plants.[45] Unique species include the Sumatran pine which dominates the Sumatran tropical pine forests of the higher mountainsides in the north of the island and rainforest plants such as Rafflesia arnoldii (the world's largest individual flower), and the titan arum (the world's largest unbranched inflorescence).

The island is home to 201 mammal species and 580 bird species. There are nine endemic mammal species on mainland Sumatra and 14 more endemic to the nearby Mentawai Islands.[45] There are about 300 freshwater fish species in Sumatra.[46] There are 93 amphibian species in Sumatra, 21 of which are endemic to Sumatra.[47]

The Sumatran tiger, Sumatran rhinoceros, Sumatran elephant, Sumatran ground cuckoo, Sumatran orangutan and Tapanuli orangutan are all critically endangered, indicating the highest level of threat to their survival. In October 2008, the Indonesian government announced a plan to protect Sumatra's remaining forests.[48]

The island includes more than 10 national parks, including three which are listed as the Tropical Rainforest Heritage of Sumatra World Heritage Site – Gunung Leuser National Park, Kerinci Seblat National Park and Bukit Barisan Selatan National Park. The Berbak National Park is one of three national parks in Indonesia listed as a wetland of international importance under the Ramsar Convention.

Sumatra has lost almost 50% of its tropical rainforest since 1980. Many species are now critically endangered, such as the Sumatran ground cuckoo, the Sumatran tiger, the Sumatran elephant, the Sumatran rhinoceros, and the Sumatran orangutan. Deforestation on the island has also resulted in serious seasonal smoke haze over neighbouring countries, such as the 2013 Southeast Asian haze which caused considerable tensions between Indonesia and affected countries Malaysia and Singapore.[2] The widespread deforestation and other environmental destruction in Sumatra and other parts of Indonesia has often been described by academics as an ecocide.[3][4][5][6]

## Rail transport

[edit]

Several unconnected railway networks built during Netherlands East Indies exist in Sumatra, such as the ones connecting Banda Aceh-Lhokseumawe-Besitang-Medan-Tebingtinggi-Pematang Siantar-Rantau Prapat in Northern Sumatra (the Banda Aceh-Besitang section was closed in 1971, but is currently being rebuilt).[49] Padang-Solok-Bukittinggi in West Sumatra, and Bandar Lampung-Palembang-Lahat-Lubuklinggau in Southern Sumatra.

## See also

[edit]

* Indonesia portal
* Islands portal

* Architecture of Sumatra
* Bukit Seguntang
* Communism in Sumatra
* Music of Sumatra

## Notes

[edit]

1. ^ The Kamus Besar Bahasa Indonesia states that Sumatra is the correct spelling in Indonesian;[1] however, it is popularly and legislatively spelled in Indonesian as Sumatera.

## References

[edit]

1. ^ "Hasil Pencarian – KBBI Daring" [Entry for "Sumatra" in the online version of the Kamus Besar Bahasa Indonesia]. kbbi.kemdikbud.go.id (in Indonesian). Ministry of Education, Culture, Research, and Technology. Archived from the original on 5 April 2023. Retrieved 16 July 2022.
2. ^ a b Shadbolt, Peter (21 June 2013). "Singapore Chokes on Haze as Sumatran Forest Fires Rage". CNN. Archived from the original on 7 November 2017. Retrieved 7 May 2017.
3. ^ a b "Forensic Architecture". forensic-architecture.org. Archived from the original on 5 July 2023. Retrieved 5 July 2023.
4. ^ a b "Explainer: What is ecocide?". Eco-Business. 4 August 2022. Archived from the original on 17 October 2023. Retrieved 5 July 2023.
5. ^ a b Aida, Melly; Tahar, Abdul Muthalib; Davey, Orima (2023), Perdana, Ryzal; Putrawan, Gede Eka; Saputra, Bayu; Septiawan, Trio Yuda (eds.), "Ecocide in the International Law: Integration Between Environmental Rights and International Crime and Its Implementation in Indonesia", Proceedings of the 3rd Universitas Lampung International Conference on Social Sciences (ULICoSS 2022), Advances in Social Science, Education and Humanities Research, vol. 740, Paris: Atlantis Press SARL, pp. 572–584, doi:10.2991/978-2-38476-046-6_57, ISBN 978-2-38476-045-9
6. ^ a b Alberro, Heather; Daniele, Luigi (29 June 2021). "Ecocide: why establishing a new international crime would be a step towards interspecies justice". The Conversation. Archived from the original on 17 July 2023. Retrieved 5 July 2023.
7. ^ Setiyono, Joko; Natalis, Aga (30 December 2021). "Ecocides as a Serious Human Rights Violation: A Study on the Case of River Pollution by the Palm Oil Industry in Indonesia". International Journal of Sustainable Development and Planning. 16 (8): 1465–1471\. doi:10.18280/ijsdp.160807. ISSN 1743-7601. S2CID 245606762.
8. ^ Milner, Anthony (2010), The Malays (The Peoples of South-East Asia and the Pacific), Wiley-Blackwell, pp. 18–19, ISBN 978-1-4443-3903-1
9. ^ Drakard, Jane (1999). A Kingdom of Words: Language and Power in Sumatra. Oxford University Press. ISBN 983-56-0035-X.
10. ^ Munoz, Paul Michel (2006). Early Kingdoms of the Indonesian Archipelago and the Malay Peninsula. Continental Sales, Incorporated. ISBN 978-981-4155-67-0.
11. ^ Marsden, William (1783). The History of Sumatra. Dutch: Longman. p. 5.
12. ^ Cribb, Robert (2013). Historical Atlas of Indonesia. Routledge. p. 249.
13. ^ Putrawan, I Nyoman Alit (20 April 2023). "THE VALUE OF RELIGIOUS MODERATION IN THE RAMAYANA EPIC". International Conference on Hindu Studies. 1 (1): 8 - via Google Scholar.
14. ^ Sneddon, James N. (2003). The Indonesian language: its history and role in modern society. UNSW Press. p. 65\. ISBN 9780868405988. Archived from the original on 29 May 2016. Retrieved 16 December 2015.
15. ^ Macdonell, Arthur Anthony (1924). A Practical Sanskrit Dictionary with Transliteration, Accentuation, and Etymological Analysis. Motilal Banarsidass Publications. p. 347\. ISBN 9788120820005. Archived from the original on 6 May 2016. Retrieved 16 December 2015. `{{cite book}}`: ISBN / Date incompatibility (help)
16. ^ Sir Henry Yule, ed. (1866). Cathay and the Way Thither: Being a Collection of Medieval Notices of China, Issue 36. pp. 86–87\. Archived from the original on 21 February 2017. Retrieved 21 February 2017.
17. ^ Marsden, William (1811). The History of Sumatra: Containing an Account of the Government, Laws, Customs and Manners of the Native Inhabitants, with a Description of the Natural Productions, and a Relation of the Ancient Political State of That Island. pp. 4–10\. Archived from the original on 22 February 2017. Retrieved 21 February 2017.
18. ^ Coedès, George (1968). Vella, Walter F. (ed.). The Indianized States of Southeast Asia. Translated by Cowing, Susan Brown. University of Hawaii Press. ISBN 978-0-8248-0368-1.
19. ^ a b "Srivijaya empire: History, Location, Religion, Government, & Facts". Britannica.com. 12 June 2023. Archived from the original on 1 June 2023. Retrieved 29 October 2022.
20. ^ Abidin, Zainal; Basri, Basri; Nopriyana, Rahma Dwi (25 November 2020). "The Network of Ulama in Lampung: Tracing The Islamic Development and Its Influence on Local Tradition and Culture". AKADEMIKA: Jurnal Pemikiran Islam. 25 (2): 315. doi:10.32332/akademika.v25i2.1672. ISSN 2356-2420. Archived from the original on 9 October 2023. Retrieved 15 September 2023.
21. ^ a b c d "Sejarah Masuknya Islam Ke Indonesia". gramedia.com. 4 November 2021. Archived from the original on 30 September 2022. Retrieved 30 September 2022.
22. ^ Tibbets, G. R. Pre-Islamic Arabia and South East Asia. In D. S. Richards, ed. (1970). Islam and The Trade of Asia. Oxford: Bruno Cassirer Pub. Ltd. p. 127 nt. 21.
23. ^ Fatimi, S. Q. In Quest of Kalah. In D. S. Richards, ed. (1970). Islam and The Trade of Asia. Oxford: Bruno Cassirer Pub. Ltd. p. 132 n. 124.
24. ^ Groeneveldt, W. P. Notes in The Malay Archipelago. In D. S. Richards, ed. (1970). Islam and The Trade of Asia. Oxford: Bruno Cassirer Pub. Ltd. p. 127 nt. 21.
25. ^ Graf, Arndt; Wieringa, Edwin Paul; Schröter, Susanne, eds. (2020). Aceh: History, Politics and Culture Volume 9. Institute of Southeast Asian Studies. p. 3\. ISBN 9789814279123.
26. ^ Sim, Hwee Hwang; Sim, Teddy Y. H., eds. (2021). Fieldwork in Humanities Education in Singapore. Springer Nature Singapore. p. 290\. ISBN 9789811582332.
27. ^ "Indonesia Agrees Aceh Peace Deal". bbc.co.uk. BBC News. 17 July 2005. Archived from the original on 9 March 2008. Retrieved 17 May 2015.
28. ^ "Aceh Under Martial Law: Inside the Secret War: Human Rights and Humanitarian Law Violations". hrw.org. Human Rights Watch. Archived from the original on 6 March 2016. Retrieved 17 May 2015.
29. ^ "Penduduk Indonesia menurut Provinsi 1971, 1980, 1990, 1995, 2000 – 2023" [Indonesian Population by Provinces 1971, 1980, 1990, 1995, 2000 and 2010]. Badan Pusat Statistik (in Indonesian). Archived from the original on 1 July 2013. Retrieved 17 July 2013.
30. ^ a b Badan Pusat Statistik, Jakarta, 2024.
31. ^ "Population Statistics". GeoHive. Archived from the original on 3 April 2012. Retrieved 25 July 2012.
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## Further reading

[edit]

* Grover, Samantha; Sukamta, Linda; Edis, Robert (August 2017). "People, Palm Oil, Pulp and Planet: Four Perspectives on Indonesia's Fire-stricken Peatlands". The Conversation.
* William Marsden, The History of Sumatra, (1783); 3rd ed. (1811) freely available online.

## External links

[edit]

Wikimedia Commons has media related to Sumatra.

Wikivoyage has a travel guide for Sumatra.

* "Sumatra" . Encyclopædia Britannica (11th ed.). 1911.

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