Air quality monitoring :  a course manual  / 
edited by B. B. Sundarsan, V. P. Thergaonkar and R. S. Swaminathan 
 - Nagpur :  S. B. Dabadgho,  1981 
 - 1v.(Various paging)  ;  28 cm. 
<br/><br/><label>Dewey Class. No.: </label>628.5302