Ambient air quality status of some cities/towns in India 
by Central Pollution Control Board 
 - Delhi  Central Pollution Control Board   
 - 196p. 
 - National ambient air quality monitoring series: Naaqms/2/1990-91 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air Pollution-India<br/>Pollution
<br/><br/><label>Dewey Class. No.: </label>X91x54 A16