Classification by Broad economy categories 

 - New York  United Nations          1986 
 - x, 67p.  cm. 
<br/><br/> Statistical paper series M, No. 53 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X:(2:51).N86, M6/UN