1. Basic Statistics 1982 National Resource: Inventory;U.S. Department of Agriculture Soil Conservation Service,1987
2. Summary Report 1987 National Resource: Inventory;U.S. Department of Agriculture Soil Conservation Service,1989
3. Land Resource Regions and Major Land Resource Areas of the United States;U.S. Department of Agriculture Soil Conservatior Service,1981
4. The Second RCA Appraisal: Soil, Water, and Related Resources on Nonfederal Land in thi United States, Analysis of Condition and Trends;U.S. Department of Agriculture Soil Conservatiior Service,1990
5. Opportunities to mitigate carbon dioxide buildup using short-rotation woody crops;Wright,1992