Kohnke, Helmut; Bertrand, Anson R <br/><br/>
Soil conservation 

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 - Mcgraw Hill Book Co., New York  1959 
 - 298 
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<br/><br/>  
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil ecology
<br/><br/><label>Dewey Class. No.: </label>577.57  KOH-S