Soil conservation / 
edited by Judith E. Ladd 
 - Washington, D.C. :  U.S. Department.of Agriculture,  1978- 
 - v. :  ill. ;  27 cm. 
<br/><br/> Library has vol. 44 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil conservation--United States<br/>Water conservation--United States
<br/><br/><label>Dewey Class. No.: </label>631.4973