Clark, Edwin H., 1938- Eroding soils : the off-farm impacts / Edwin H. Clark, Jennifer A. Haverkamp and William Chapman. - Washington D. C. : The Conservation Foundation, 1985. Bibliography. ISBN: 089164086X Subjects--Topical Terms: Soil erosionWater -- Pollution -- Environmental aspects.--Water -- Pollution -- Environmental aspects.--Water -- Pollution -- Environmental aspects. LC Class. No.: QH545.S64 / CLA 1985