APA (7th ed.) Citation

Geological Survey (U.S.) & ProQuest (Firm). (1927). Contributions to the geography of the United States 1926. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Contributions to the Geography of the United States 1926. Washington: [publisher not identified], 1927.

MLA (8th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Contributions to the Geography of the United States 1926. [publisher not identified], 1927.

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