proceedings of the Ninth Long Ashton Symposium / 
edited by  Ofori  and ,F 
 - Ghana  International society for tropical roots crops531  1991 
 - 531pg  ill. ; 
<br/><br/><label>ISBN: </label>0521320682 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pesticides--Congresses.
<br/><br/><label>LC Class. No.: </label>S 590.P7  1991