Martin, John H. <br/><br/>
Principlrs of field crop production / 
John H. Martin. 
 - New York :  MacMillan,  1949. 
 - ix, 1176p. :  ills. ;  30 cm.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crop produce.<br/>Agriculture 
<br/><br/><label>Dewey Class. No.: </label>631  / MAP 1968