Helmut Kohnke <br/><br/>
Soil conservation 

 - New York  McGraw Hill Book Co.Inc  1959 
 - 298p 
<br/><br/>Helmut Kohnke & Anson R. Bertrand: Soil conservation.  New York.  McGraw Hill Book Co.Inc, 1959. 81-7622-201-3--(631.45KOH)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>ISBN: </label>81-7622-201-3 
<br/><br/><label>Dewey Class. No.: </label>631.45  / KOH