Environmental air pollution and its control   
ed. by G. R. Chhatwal, M. C. Mehra, T. Katyal. 
 - New Delhi  Anmol  1989 
 - iv, 591p 
<br/><br/><label>ISBN: </label>8170412137 
<br/><br/><label>Dewey Class. No.: </label>363.7392  / N891