Martin, J.H.  <br/><br/>
Principles of field crop production  (Book) 

 - 3rd ed. 
 - New York  Macmillan Publishing  1976 
 - 1118 p.  23 cm. 
<br/><br/><label>ISBN: </label>0023767200 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Field crops--United States
<br/><br/><label>Universal Decimal Class. No.: </label>633 MAR  / 2478