Hay, Robert K. M. <br/><br/>
An introduction to the physiology of crop yield 

 - Harlow  Longman Scientific & Technical  1989 
 - 292 
<br/><br/><label>ISBN: </label>0-470-21192-x 
<br/><br/><label>Subjects--Index Terms: </label>PHYSIOLOGY CROP YIELD CASE HISTORIES 
<br/><br/><label>Dewey Class. No.: </label>631.52