Não informado. (1958). Mineral Industries Bulletin. Colorado School of Mines.
Chicagoスタイル(17版)引用形式Não informado. Mineral Industries Bulletin. Golden, Colo: Colorado School of Mines, 1958.
MLA(8版)引用形式Não informado. Mineral Industries Bulletin. Colorado School of Mines, 1958.
警告: この引用は必ずしも正確ではありません.