Perkins, Henry C <br/><br/>
Air pollution 

 - New Delhi  Mc Graw - Hill  1974 
 - 407p. 
<br/><br/><label>ISBN: </label>0070493022 
<br/><br/><label>Subjects--Index Terms: </label>Air pollution 
<br/><br/><label>Universal Decimal Class. No.: </label>614.71   / PER