Commodity trade (by Sea) statistics 1981   Maritime transport study.    

 - New York  United Nations          1984 
 - xxxvii,379p.  cm. 
<br/><br/> Statistical papers series D, vol. xxviii- xxxi, no.2 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X:54.1N45.N84s, M4/UN