Não informado. (1949). Mining transactions. American Institute of Mining, Metallurgical and Petroleum Engineers.
Chicagoスタイル(17版)引用形式Não informado. Mining Transactions. New York: American Institute of Mining, Metallurgical and Petroleum Engineers, 1949.
MLA(8版)引用形式Não informado. Mining Transactions. American Institute of Mining, Metallurgical and Petroleum Engineers, 1949.
警告: この引用は必ずしも正確ではありません.