Não informado. (2020). Bi-Monthly Bulletin of the American Institute of Mining Engineers. American Institute of Mining Engineers.
Chicago-referens (17:e uppl.)Não informado. Bi-Monthly Bulletin of the American Institute of Mining Engineers. New York: American Institute of Mining Engineers, 2020.
MLA-referens (8:e uppl.)Não informado. Bi-Monthly Bulletin of the American Institute of Mining Engineers. American Institute of Mining Engineers, 2020.
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