Sagar, G.R. <br/><br/>
Origin of pest, parasite,diseases and weed problems 

 - 
 - Oxford  Blackwell Scientific Publication  1977 
 - 413p.   
<br/><br/>  British Ecological Society symposium 18th, 1976. 
<br/><br/><label>ISBN: </label>
<br/><br/><label>ISSN: </label>
<br/><br/><label>Subjects--Index Terms: </label>Weed Problems 
<br/><br/><label>Dewey Class. No.: </label>632