Não informado. (1937). Mining Technology. American Institute of Mining and Metallurgical Engineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Mining Technology. New York: American Institute of Mining and Metallurgical Engineers, 1937.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Mining Technology. American Institute of Mining and Metallurgical Engineers, 1937.
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