United States. Bureau of Mines. (1937). Mining and milling methods at Pilgrim mine, Chloride, Ariz. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Mines. Mining and Milling Methods at Pilgrim Mine, Chloride, Ariz. [Washington]: [s.n.], 1937.
MLA (9th ed.) CitationUnited States. Bureau of Mines. Mining and Milling Methods at Pilgrim Mine, Chloride, Ariz. [s.n.], 1937.
Warning: These citations may not always be 100% accurate.