Evenson R E Ed. <br/><br/>
Crop variety improvement and its effect on productivity    The impacat of international agricutural research.      
Evenson R E Ed.; Gollin D Ed. 
 - Wallingford  CABI Publishing        2003 
 - xxv,522p.  cm. 
<br/><br/><label>Standard No.: </label>27853 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>J3:5, P3