Não informado. (2019). The Mining Journal, Annual Review. Mining Journal.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The Mining Journal, Annual Review. London: Mining Journal, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The Mining Journal, Annual Review. Mining Journal, 2019.
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