The Heer or Waffen-SS used a similar naming convention to the Luftwaffe. An Infantry, Panzer, Grenadier division was normally composed of three regiments. Each of these regiments was composed of three battalions denoted by Roman numerals. Each battalion was composed of three companies which were numbered by Arabic numerals. This naming scheme also applied to land based units of the Kriegsmarine, Luftwaffe and the Waffen-SS.
Obermaier, Ernst (1976). Die Ritterkreuzträger der Luftwaffe 1939-1945 Band II Stuka- und Schlachtflieger (in German). Mainz, Germany: Verlag Dieter Hoffmann. ISBN3-87341-021-4.
Scherzer, Veit (2007). Die Ritterkreuzträger 1939–1945 Die Inhaber des Ritterkreuzes des Eisernen Kreuzes 1939 von Heer, Luftwaffe, Kriegsmarine, Waffen-SS, Volkssturm sowie mit Deutschland verbündeter Streitkräfte nach den Unterlagen des Bundesarchives (in German). Jena, Germany: Scherzers Miltaer-Verlag. ISBN978-3-938845-17-2.