Kohnke, Helmut, 1901- [from old catalog] Soil conservation - New York, McGraw-Hill, 1959. - vii, 298 p. illus., tables. 24 cm. ISBN: 10: 8176222011 13: 9788176222013 LCCN: 59008545 Subjects--Topical Terms: Soil conservation. LC Class. No.: S 623 / .K56 2009