APA (7th ed.) Citation

United States. Bureau of Mines. (1922). Milling methods in Tri-State zinc district. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Milling Methods in Tri-State Zinc District. [Washington]: [publisher not identified], 1922.

MLA (9th ed.) Citation

United States. Bureau of Mines. Milling Methods in Tri-State Zinc District. [publisher not identified], 1922.

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