Simmonds, N.W.,  <br/><br/>
Principles of crop improvement / 
N. W.Simmonds 
 - Singapore :  Longman,  1981 
 - v, 408 pages :  illustration ;  21 cm 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0582407370 (paperback) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crop improvement
<br/><br/><label>LC Class. No.: </label>SB106.I47 S56