The Biology of crop productivity / 
edited by Peter S. Carlson. 
 - San Francisco :  Academic Press,  1980. 
 - xvii, 471 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliograpies and index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0121598500 
<br/><br/><label>LCCN: </label>7928261  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crop yields.