APA (7th ed.) Citation

Geological Survey (U.S.) & ProQuest (Firm). (1921). Mineral resources of the United States 1918. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Mineral Resources of the United States 1918. Washington: [publisher not identified], 1921.

MLA (9th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Mineral Resources of the United States 1918. [publisher not identified], 1921.

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