Agriculture and the quality of our environment - American Association for the Advancement of Science Washington 1967 - xv,460,tables,maps - Air quality Water quality Soil pollution Animal wastes Brady, N.C. Brady, N.C. Nat. Bib. No.: 0095 Nat. Bib. Agency Control No.: 63(73)AGR Subjects--Topical Terms: Agriculture Universal Decimal Class. No.: 63(73) 1