Bennett, Hugh H. c1881-1960. Elements of soil conservation. - 1st edition. - New York ; London : McGraw-Hill Book Company Incorporation, c1947. - x, 406 pages : illustrations (maps) ; 21 cm. LCCN: agr47000135 Subjects--Topical Terms: Soil conservation--United States.Soil erosion--United States. LC Class. No.: S623 / .B352