Trivedi, P R <br/><br/>
Environmental Air Analysis. 
By P R Trivedi & Gurdeep Raj 
 - 1st Ed. 
 - New Delhi:  Akashdeep Publishing House ,  1992. 
 - 179p.:  15cm. 
<br/><br/><label>ISBN: </label>8171582419 
<br/><br/><label>Subjects--Index Terms: </label>Geography & travel, Geography 
<br/><br/><label>Dewey Class. No.: </label>910