Customs areas of the world.   

 - New York :   United Nations,   1989. 
 - 27 p. ;    28 cm. 
 - Statistical papers.    Series M ;   no. 30, rev. 2 .
<br/><br/><label>ISBN: </label>9211613094 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Customs administration.--------