1500 BC: Coalescence of a number of cultural traits including undecorated pottery, megalithic burials, and millet-bean-rice agriculture indicate the beginning of the Mumun Pottery Period on the Korean peninsula.[3]
^Hencken, Hugh (1965). "ARCHEOLOGY: Early Greek Armour and Weapons from the End of the Bronze Age to 600 B.C. ANTHONY SNODGRASS". American Anthropologist. 67 (4): 1054–1055. doi:10.1525/aa.1965.67.4.02a00450. ISSN1548-1433.
^Gates, Charles (2011). Ancient Cities: The Archaeology of Urban Life in the Ancient Near East and Egypt, Greece, and Rome (2nd ed.). Abingdon, Oxon: Routledge. p. 160. ISBN9780415498647.
^Diehl, Richard A. (2004). The Olmecs : America's First Civilization. London: Thames and Hudson. pp. 9–25. ISBN0500285039.