Transvaal (Colony). Geological Survey & Transvaal (Colony). Mines Dept. Report of the Geological Survey for the year ... Govt. Print. and Stationery Office.
Lua i Stíl Chicago (17ú heag.)Transvaal (Colony). Geological Survey agus Transvaal (Colony). Mines Dept. Report of the Geological Survey for the Year ... Pretoria: Govt. Print. and Stationery Office.
Lua MLA (8ú heag.)Transvaal (Colony). Geological Survey agus Transvaal (Colony). Mines Dept. Report of the Geological Survey for the Year ... Govt. Print. and Stationery Office.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.