Trivedi, P R <br/><br/>
Encyclopedia of Environmental Science / 
P R Trivedi 
 - New Delhi :  Akashdeep Publishing,  1992. 
 - 278 p. 
<br/><br/><label>ISBN: </label>8171582796 
<br/><br/><label>Dewey Class. No.: </label>333.7  / TRI