Proceedings of the fourth National Weeds Conference of South Africa/ 
edited by H. A. van de Venter and M. Mason. 
 - Cape Town:  A. A. Balkema,  1982. 
 - 180 p.  :ill.;   23 cm. 
<br/><br/><label>ISBN: </label>0869611399 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Weeds--Africa,Southern--Congresses<br/>Weed control--Africa,Southern--Congresses.