National Program for Soil and Water Conservation, 1980 Program Report D; Appraisal Review Draft, Pt.2 B1(v.2); Appraisal: Soil and Water Related Resources in the U.S. B2(2v); Summary of Appraisal, Parts I and II, and Program Report Dsum; National Program for Soil and Water Conservation, 1981 Program Report: Environmental Impact Statement, Volume 1