Donahue, Roy Luther 1908- Our soils and their management : an introduction to soil and wate r conservation / Roy Luther Donahue. - 2nd ed. - Danville, Ill. : Interstate Printers & Publishers, 1961. - 568 p. : ill. ; 24 cm. Includes bibliographical references and index Subjects--Topical Terms: Soil management Water conservation. Dewey Class. No.: 631.4 DON