Willmar, C. M. <br/><br/>
Principles of Crop Improyement / 
Willmar, C. M. 
 - 1st ed. 
 - ill.408p.:ill; 22cm. 
<br/><br/><label>ISBN: </label>0582407028 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant ill.ruses<br/>Plant ill.rology
<br/><br/><label>Dewey Class. No.: </label>632