APA (7th ed.) Citation

Geological Survey (U.S.) & ProQuest (Firm). (1922). Contributions to the hydrology of the United States 1921. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Contributions to the Hydrology of the United States 1921. Washington: [publisher not identified], 1922.

MLA (9th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Contributions to the Hydrology of the United States 1921. [publisher not identified], 1922.

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