Soil survey manual 

 - Washington :  Department of Agriculture,  1951 
 - 503 p.  : ilus. 
 - Agriculture handbook  ; 18 .
 - Agriculture handbook  ; 18 .
<br/><br/><label>LCCN: </label>39561 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos.<br/>Suelos--E.U.A.
<br/><br/><label>Dewey Class. No.: </label>631.47  / E83