SIMMONDS, N.W <br/><br/>
PRINCIPLES OF CROP IMPROVEMENT 

 - 2nd. ed. 
 - TOKYO  BLACKWELL SCIENCE  1999 
 - 411p. 
<br/><br/><label>ISBN: </label>0632041919 
<br/><br/><label>LC Class. No.: </label>SB 106  / .S56 1999