Customs areas of the world. 

 - New Delhi   UN           1970 
 - vii,34p.  cm. 
 - Statistical papers series M; 30/Rev.1 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>V1N45,93:3.N70, L/UN