Buol, Stanley Walter. <br/><br/>
Soil genesis and classification 

 - Ames :  Iowa State University,  1973 
 - 360 p.  : ilus. 
<br/><br/><label>LCCN: </label>25831 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos--Clasificación.<br/>Suelos--Formación.
<br/><br/><label>Dewey Class. No.: </label>631.44  / B8