United States. Bureau of Mines. (1936). Shaft sinking with a shot drill, Idaho Maryland mine, Grass Valley, Calif. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Mines. Shaft Sinking with a Shot Drill, Idaho Maryland Mine, Grass Valley, Calif. [Washington]: [s.n.], 1936.
MLA (9th ed.) CitationUnited States. Bureau of Mines. Shaft Sinking with a Shot Drill, Idaho Maryland Mine, Grass Valley, Calif. [s.n.], 1936.
Warning: These citations may not always be 100% accurate.