Trivedi, P.R. <br/><br/>
International encyclopedia of Ecology and Environment 
P.R. Trivedi. 
 - 3rd ed. 
 - New Delhi  Indian Institute of Ecology and Environment  1994 
 - 30 v., 21cm.- (V.20: Environmental analysis). 
<br/><br/> Library has all 30 the volumes. 
<br/><br/><label>ISBN: </label>81-7456-023-8. 
<br/><br/><label>Dewey Class. No.: </label>574.530  / T79I