Held, R. Burnell. <br/><br/>
Soil conservation in prespective 

 - Baltimore, Md. :  Johns Hopkins,  1965 
 - 344 p.  : mapas 
<br/><br/><label>LCCN: </label>13097 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos--Conservación.
<br/><br/><label>Dewey Class. No.: </label>631.45  / H4