Commodity trade (By Sea) statistics   Maritime transport study for the years 1975-1978.    

 - New York  United Nations          1982 
 - vii,412p.  cm. 
<br/><br/> Statiscal papers series D, vol.xxv-xxviii, no. 2 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X:54.1N45.N82s, M2.25-28/UN