Evans l. t. <br/><br/>
Crop evolution, adaptation and yield 

 -  Cambridge university  1993 
<br/><br/><label>ISBN: </label>0-521-22571-X 
<br/><br/><label>LC Class. No.: </label>630/EVA 
<br/><br/><label>Dewey Class. No.: </label>630/EVA