Proceedings of the second international clean air congress 

 - New York:   Academic Press,   1971 
 - 1353p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air 
<br/><br/><label>Subjects--Index Terms: </label>Clean air 
<br/><br/><label>Universal Decimal Class. No.: </label>614.71(082.2)   / L1