United States. Soil Conservation Service. (1965). Land resource regions and major land resource areas of the United States (exclusive of Alaska and Hawaii) (January 1963, slightly revised August 1965.). The Service.
Chicago Style (17th ed.) CitationUnited States. Soil Conservation Service. Land Resource Regions and Major Land Resource Areas of the United States (exclusive of Alaska and Hawaii). January 1963, slightly revised August 1965. Hyattsville, Md.: The Service, 1965.
MLA (9th ed.) CitationUnited States. Soil Conservation Service. Land Resource Regions and Major Land Resource Areas of the United States (exclusive of Alaska and Hawaii). January 1963, slightly revised August 1965. The Service, 1965.
Warning: These citations may not always be 100% accurate.