RANA, S V S. <br/><br/>
Essentials of Ecology and Environmental Science. 

 - 2nd edi. 
 - New Delhi.  Prentice-Hall of India pvt lt  d.         2005 
 - xv, 488p. 
<br/><br/><label>ISBN: </label>81 203 2773 X 
<br/><br/><label>Dewey Class. No.: </label>577