The Biology of crop productivity / 
edited by Peter S. Carlson 
 - New York :  Academic Press,  1980 
 - xvii, 471p. :  ill. ;  24cm. 
<br/><br/>Includes bibliographies 
<br/><br/><label>ISBN: </label>0121598500  hardcovers 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crop yields