Estimated world requirements of Narcotic Drugs   and estimates of world production of opium in 1971.    

 - New York  United nations          1971 
 - 50p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>V1N45,93:3:(F56).N71, L1/UN