ASHTON Floyd, M. <br/><br/>
Weed Science-Principles & Practices 

 - 3rd 
 - New York  John Wiley & Sons,inc  1991 
 - x, 466p. 
<br/><br/><label>ISBN: </label>0-471-60084-9 
<br/><br/><label>Dewey Class. No.: </label>632.58