Não informado. (1871). Transactions of the American Institute of Mining Engineers. American Institute of Mining Engineers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Transactions of the American Institute of Mining Engineers. New York: American Institute of Mining Engineers, 1871.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Transactions of the American Institute of Mining Engineers. American Institute of Mining Engineers, 1871.
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