Geological Survey (South Africa) & Coetzee, C. B. (1976). Mineral resources of the Republic of South Africa (5th ed.). The Survey : printed by and obtainable from the Government Printer.
Lua i Stíl Chicago (17ú heag.)Geological Survey (South Africa) agus C. B. Coetzee. Mineral Resources of the Republic of South Africa. 5th ed. Pretoria: The Survey : printed by and obtainable from the Government Printer, 1976.
Lua MLA (8ú heag.)Geological Survey (South Africa) agus C. B. Coetzee. Mineral Resources of the Republic of South Africa. 5th ed. The Survey : printed by and obtainable from the Government Printer, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.