Transvaal (Colony). Geological Survey & Transvaal (Colony). Mines Dept. Report of the Geological Survey for the year ... Govt. Print. and Stationery Office.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTransvaal (Colony). Geological Survey और Transvaal (Colony). Mines Dept. Report of the Geological Survey for the Year ... Pretoria: Govt. Print. and Stationery Office.
एमएलए (8वां संस्करण) प्रशस्ति पत्रTransvaal (Colony). Geological Survey और Transvaal (Colony). Mines Dept. Report of the Geological Survey for the Year ... Govt. Print. and Stationery Office.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.