CHAPMAN, Stephen R. <br/><br/>
Crop Production : Principles and Practices. 

 - San Francisco.  W. H. Freeman and Company.  1976 
 - viii, 566p 
<br/><br/><label>ISBN: </label>0 7167 0581 8 
<br/><br/><label>Dewey Class. No.: </label>631.5