Chatwal, G.R. <br/><br/>
Environmental air pollution and its control  G.R. Chatwal and others. 

 - New Delhi  Anmol Publications  n.d. 
 - 391p., ill. 22cm. 
<br/><br/><label>ISBN: </label>81-7041-213-7. 
<br/><br/><label>Dewey Class. No.: </label>614.71,  / E75E