Proceedings 

 - Brookings, South Dakota :  NCWC,  (s.a.) 
 - 120 p. 
<br/><br/><label>LCCN: </label>32967 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Malas hierbas--Control.
<br/><br/><label>Dewey Class. No.: </label>632.58  / N6 1949