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- Helms, J.D. , Reinhardt, K.H. , Margheim, G.A.
- agriculture , environmental management , soil conservation , water conservation , environmental law , USDA , erosion control , water quality , laws and regulations , United States
- Physical description:
- p. 9-15.
- Rural Development Publications Collection
- Yearbook of agriculture
- Part Of:
- Yearbook of agriculture. 1991