Não informado. (1962). Annals of the Geological Survey. Republic of South Africa, Department of Mines.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Annals of the Geological Survey. Pretoria, Africa do Sul: Republic of South Africa, Department of Mines, 1962.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Annals of the Geological Survey. Republic of South Africa, Department of Mines, 1962.
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