Não informado. (1971). Minerals and Mineral Products. Commonwealth Bureau of Census and Statistics.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Minerals and Mineral Products. Canberra: Commonwealth Bureau of Census and Statistics, 1971.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Minerals and Mineral Products. Commonwealth Bureau of Census and Statistics, 1971.
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