APA (7th ed.) Citation

(1919). Soil map: Iowa. U.S. Dep. of Agriculture, Bureau of Soils.

Chicago Style (17th ed.) Citation

Soil Map: Iowa. S.l. [Baltimore]: U.S. Dep. of Agriculture, Bureau of Soils, 1919.

MLA (9th ed.) Citation

Soil Map: Iowa. U.S. Dep. of Agriculture, Bureau of Soils, 1919.

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