United Nations, Department of Economic and Social Affairs, Statistical Office. <br/><br/>
Classification by broad economic categories . 

 - New York  United Nations  1971 
 - xi, 28p. 
 - United Nations Statistical papers series M .
<br/><br/> Trade 
<br/><br/><label>Subjects--Topical Terms: </label><br/>D9321<br/>Trade classification