APA (7th ed.) Citation

Russel, R. C., & Lockridge, L. D. (1980). Soil survey of Marion County, Iowa. The Service.

Chicago Style (17th ed.) Citation

Russel, Robert C., and L. Dale Lockridge. Soil Survey of Marion County, Iowa. [Washington, D.C.]: The Service, 1980.

MLA (9th ed.) Citation

Russel, Robert C., and L. Dale Lockridge. Soil Survey of Marion County, Iowa. The Service, 1980.