APA (7th ed.) Citation

United States. Bureau of Mines. (1937). Progress reports, Metallurgical Division: 20, Annual report of Metallurgical Division, fiscal year 1936-37. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Progress Reports, Metallurgical Division: 20, Annual Report of Metallurgical Division, Fiscal Year 1936-37. [Washington]: [s.n.], 1937.

MLA (9th ed.) Citation

United States. Bureau of Mines. Progress Reports, Metallurgical Division: 20, Annual Report of Metallurgical Division, Fiscal Year 1936-37. [s.n.], 1937.