Cox  Joseph F. Jackson  Lyman Edson <br/><br/>
Crop management and soil conservation 

 - 2nd. ed. 
 - New York      John wiley  US 1948     
 - xxii, 572p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>  <Agriculture><Crops><Soils><Farm management><Soil conservation><United States>
<br/><br/><label>Dewey Class. No.: </label>633/COX