APA (7th ed.) Citation

United States. Bureau of Mines. (1942). Investigations of permissible electric mine lamps, 1930-40. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Investigations of Permissible Electric Mine Lamps, 1930-40. [Washington]: [s.n.], 1942.

MLA (9th ed.) Citation

United States. Bureau of Mines. Investigations of Permissible Electric Mine Lamps, 1930-40. [s.n.], 1942.