Proceedings 

 - Brighton, England :  The Council,  1989 
 - 3 v.  : ilus. ; gráfs 
<br/><br/> D50-61 
<br/><br/><label>LCCN: </label>3493 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Herbicidas.<br/>Malas hierbas--Control.
<br/><br/><label>Dewey Class. No.: </label>632.58  / B76 1989