Soil conservation policies an assessment  : based on material presented at the National Conference... 

 - Washington :  The society,  1979 
 - 154 p. 
<br/><br/><label>LCCN: </label>56847 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos--Conservación--Leyes.
<br/><br/><label>Dewey Class. No.: </label>631.45  / S6