APA (7th ed.) Citation

United States. Bureau of Mines. (1936). Progress report no. 2 on investigation of detachable rock­drill bits. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Progress Report No. 2 on Investigation of Detachable Rock­drill Bits. [Washington]: [s.n.], 1936.

MLA (9th ed.) Citation

United States. Bureau of Mines. Progress Report No. 2 on Investigation of Detachable Rock­drill Bits. [s.n.], 1936.

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