Proceedings of the IV International Symposium on Biological Control of Weeds / 
editor ; T. E. Freeman. 
 - iv, 298 pages :  illustrations ;  28 cm. 
<br/><br/><label>ISBN: </label> Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Weeds--Biological control--Congresses.