Trivedi, P R <br/><br/>
Environmental Air Pollution / 
P R Trivedi ; Gurdeep Raj 
 - New Delhi:  Akashdeep Pub House,  1992. 
 - 296p 
<br/><br/><label>ISSN: </label>8171582427 
<br/><br/><label>Dewey Class. No.: </label>628.53  / TRI/E