Troeh, Frederick R. <br/><br/>
Soil and water conservation; for productivity and environmental protection 

 - Englewood Cliffs, Prentice Hall,  1980 
 - 718 p.  : ilus. 
<br/><br/><label>LCCN: </label>52854 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agua--Conservacion.<br/>Erosión.<br/>Suelos--Conservación.
<br/><br/><label>Dewey Class. No.: </label>631.45  / T7