APA (7th ed.) Citation

United States. Bureau of Mines. (1939). Coal-­mine explosions and coal­ and metal­mine fires in United States during fiscal year 1939. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Coal-­mine Explosions and Coal­ and Metal­mine Fires in United States During Fiscal Year 1939. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Bureau of Mines. Coal-­mine Explosions and Coal­ and Metal­mine Fires in United States During Fiscal Year 1939. [s.n.], 1939.

Warning: These citations may not always be 100% accurate.