APA (7th ed.) Citation

United States. Bureau of Mines. (1939). Coal-Ưmine mechanization and accident-Ưfrequency rates of hand and mechanical loading in Illinois. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Coal-Ưmine Mechanization and Accident-Ưfrequency Rates of Hand and Mechanical Loading in Illinois. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Bureau of Mines. Coal-Ưmine Mechanization and Accident-Ưfrequency Rates of Hand and Mechanical Loading in Illinois. [s.n.], 1939.