van Wyk, J A <br/><br/>
Refugia--overlooked as perhaps the most potent factor concerning the development of anthelmintic resistance.  [electronic resource] 

 -  The Onderstepoort journal of veterinary research  Mar 2001 
 - 55-67 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0030-2465 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animal Husbandry--methods<br/>Animals<br/>Anthelmintics--pharmacology<br/>Cattle<br/>Cattle Diseases--drug therapy<br/>Drug Resistance<br/>Helminths--drug effects<br/>Nematode Infections--drug therapy<br/>Ruminants--parasitology<br/>Sheep<br/>Sheep Diseases--drug therapy