Commodity trade statistics. 

 - New York  United Nations          1991 
 - 573p.  cm. 
 -  Vol. 60, no. 1-4 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X:54.1N45.N91s, N1/UN