APA (7th ed.) Citation

United States. Bureau of Chemistry and Soils. (1931). Soil survey of Butler County, Iowa. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Bureau of Chemistry and Soils. Soil Survey of Butler County, Iowa. Washington: U.S. GPO, 1931.

MLA (9th ed.) Citation

United States. Bureau of Chemistry and Soils. Soil Survey of Butler County, Iowa. U.S. GPO, 1931.

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