APA (7th ed.) Citation

United States. Bureau of Soils & ProQuest (Firm). (1911). [Field operations of Bureau of Soils, 1909, vol. 2: Maps]. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Bureau of Soils and ProQuest (Firm). [Field Operations of Bureau of Soils, 1909, Vol. 2: Maps]. Washington: [publisher not identified], 1911.

MLA (9th ed.) Citation

United States. Bureau of Soils and ProQuest (Firm). [Field Operations of Bureau of Soils, 1909, Vol. 2: Maps]. [publisher not identified], 1911.

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