APA (7th ed.) Citation

Geological Survey (U.S.) & ProQuest (Firm). (1911). Results of spirit leveling in Iowa 1896 to 1909, inclusive. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Results of Spirit Leveling in Iowa 1896 to 1909, Inclusive. Washington: [publisher not identified], 1911.

MLA (9th ed.) Citation

Geological Survey (U.S.) and ProQuest (Firm). Results of Spirit Leveling in Iowa 1896 to 1909, Inclusive. [publisher not identified], 1911.

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