Troeh, Frederick R. Soil and Water Conservation Frederick R. Troeh, J. Arthur, Roy L. Donahue - 2nd ed. - New Jersey : Prentice Hall Career and Technology 1991 - xiii,530p. : ill ., pics., ; 25 cm ISBN: 013830324X Subjects--Topical Terms: Soil Conservation Dewey Class. No.: 333.72 TRO