APA (7th ed.) Citation

United States. Bureau of Mines. (1938). Multiple-Ưshift mechanical mining in some bituminous coal mines, progress report 1. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Multiple-Ưshift Mechanical Mining in Some Bituminous Coal Mines, Progress Report 1. [Washington]: [s.n.], 1938.

MLA (9th ed.) Citation

United States. Bureau of Mines. Multiple-Ưshift Mechanical Mining in Some Bituminous Coal Mines, Progress Report 1. [s.n.], 1938.