Transvaal (Colony). Geological Survey & Transvaal (Colony). Mines Dept. Report of the Geological Survey for the year ... Govt. Print. and Stationery Office.
Chicago-referens (17:e uppl.)Transvaal (Colony). Geological Survey och Transvaal (Colony). Mines Dept. Report of the Geological Survey for the Year ... Pretoria: Govt. Print. and Stationery Office.
MLA-referens (8:e uppl.)Transvaal (Colony). Geological Survey och Transvaal (Colony). Mines Dept. Report of the Geological Survey for the Year ... Govt. Print. and Stationery Office.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.