Sharma, P. D <br/><br/>
Ecology and Environment 

 - 11 ed. 
 - New Delhi ,  Rastogi Publication ;  2012 
 - 643p. 
<br/><br/><label>ISBN: </label>81-7133-965-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology<br/>Environment<br/>Ecosystems
<br/><br/><label>Dewey Class. No.: </label>577 SHA/E