Weeds of the West / 
Daniel A. Ball,... [et al.]. 
 - 9th ed. 
 - Newark :  The Western Society of Weed Science,  2001. 
 - ix, 626 p. :  ill. ;  23 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0756711827:  GBP 59.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Weeds--Identification.--West (United States
<br/><br/><label>Dewey Class. No.: </label>581.652