APA (7th ed.) Citation

Greenawalt, R. D. (1964). Soil survey, Washington County, Nebraska. U.S. Dept. of Agriculture, Soil Conservation Service.

Chicago Style (17th ed.) Citation

Greenawalt, Ross Dilworth. Soil Survey, Washington County, Nebraska. Washington, D.C.: U.S. Dept. of Agriculture, Soil Conservation Service, 1964.

MLA (9th ed.) Citation

Greenawalt, Ross Dilworth. Soil Survey, Washington County, Nebraska. U.S. Dept. of Agriculture, Soil Conservation Service, 1964.