Indexes to the international standard industrial classification of all economic activities. 

 - New York  UN           1971 
 - v,247p.  cm. 
 - Statistical papers series M;4 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>V1N45,93:3:(X9).N71, L1/UN