United States. Bureau of Mines. (1939). Progress Reports - Metallurgical Division, 29. Silver-Recovery Studies, Some Factors Affecting the Flotation of Silver Minerals. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Mines. Progress Reports - Metallurgical Division, 29. Silver-Recovery Studies, Some Factors Affecting the Flotation of Silver Minerals. [Washington]: [s.n.], 1939.
MLA (9th ed.) CitationUnited States. Bureau of Mines. Progress Reports - Metallurgical Division, 29. Silver-Recovery Studies, Some Factors Affecting the Flotation of Silver Minerals. [s.n.], 1939.
Warning: These citations may not always be 100% accurate.