Commodity trade statistics 1991. 

 - New York  U.N.           1993 
 - 331p.  cm. 
 - Statistical paper series D. .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X:54.1N45.N91s, N3.41/UN