APA (7th ed.) Citation

United States. Bureau of Mines. (1937). Mining and grinding methods and costs at Malvern Clay Co. mine, Malvern, Ohio. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Mining and Grinding Methods and Costs at Malvern Clay Co. Mine, Malvern, Ohio. [Washington]: [s.n.], 1937.

MLA (9th ed.) Citation

United States. Bureau of Mines. Mining and Grinding Methods and Costs at Malvern Clay Co. Mine, Malvern, Ohio. [s.n.], 1937.

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