Air Quality in selected cities in India 1980-1981  :  national air quality monitoring network / 
edited by B. B. Sunderesan ; Govt. of India 
 - Nagpur :  National Environmental Engineering Research Institute ,  1978-1983 
 - v :  ill. ;  31 cm. 
 - 1978-1981 
<br/><br/><label>Dewey Class. No.: </label>628.53