United States. Soil Conservation Service & University of Nebraska. Lincoln Conservation and Survey Division. (1985). Soil survey of Valley County, Nebraska. The Service.
Chicago Style (17th ed.) CitationUnited States. Soil Conservation Service and University of Nebraska. Lincoln Conservation and Survey Division. Soil Survey of Valley County, Nebraska. [Washington, D.C.?]: The Service, 1985.
MLA (9th ed.) CitationUnited States. Soil Conservation Service and University of Nebraska. Lincoln Conservation and Survey Division. Soil Survey of Valley County, Nebraska. The Service, 1985.
Warning: These citations may not always be 100% accurate.