Commodity trade statistics, 1990.. 

 - New York  United Nations          1991 
 - 479p.  cm. 
<br/><br/> Statistical papers series D,vol. xl, no. 1-7 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X:54.1N45.N91s, N1/UN