Directory of personnel engaged in weed science :   United States, Canada, Puerto Rico, México  / 
by Weed Science Society of America 
 - s.l. :   s.e. 
 - 95 p. 
<br/><br/><label>LCCN: </label>206461 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Malas hierbas -- investigación--directorios
<br/><br/><label>Dewey Class. No.: </label>PA 632.58 W47