the world bank  research observer 

 - USA  The international bank  1993 
 - 117p.  26cm. 
<br/><br/><label>ISBN: </label>0821322095 
<br/><br/><label>Subjects--Topical Terms: </label><br/>the economics of malaria control,
<br/><br/><label>LC Class. No.: </label>HB1  / .W67