PROCEEDINGS OF THE SECOND INTERNATIONAL SYMPOSIUM ON BIOLOGICAL CONTROL OF WEEDS 

 - ENGLAND  COMMONWEALTH AGRICULTURAL BUREAUX  1973 
<br/><br/><label>ISBN: </label>0 85198 299 9 
<br/><br/><label>LC Class. No.: </label>632/PRO  / 1 
<br/><br/><label>Dewey Class. No.: </label>632/PRO  / 1