Troeh, F.R. <br/><br/>
Soils and Soil Fertility 

 - 6th ed. 
 - U.S.A.  Blackwell Publishing  2005 
 - Viii; 489p.  illustrations 
<br/><br/><label>ISBN: </label>9780813809557 
<br/><br/><label>LC Class. No.: </label>S591  / .T74