Rana ,S V S., <br/><br/>
Essentials of ecology and environmental science 

 - 4th ed. 
 - New Delhi  PHI Learning  2009 
 - xv; 568p:  ill.;  25 cm. 
<br/><br/> Includes IndexEastern economy edition. 
<br/><br/><label>ISBN: </label>9788120338944 
<br/><br/><label>Dewey Class. No.: </label>577 RAN