Commodity trade statistics. 

 - New York  United Nations          1993 
 - 321p.  cm. 
 - Statistical papers series D,Vol.xlii, no.1-20 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X:54.1N45-N92s, N2.42-(1-20)/UN