Não informado. (1950). Colonial Geology and Mineral Resources. Colonial Geological Survey.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Colonial Geology and Mineral Resources. London: Colonial Geological Survey, 1950.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Colonial Geology and Mineral Resources. Colonial Geological Survey, 1950.
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