Rana, S V S. <br/><br/>
Essentials of ecology and environmental science /  
by S. V. S. Rana. 
 - 4th ed /   . 
 - New Delhi :   PHI Learning ,   2009. 
 - xiv, 568p. :   ills. figs, tables ;   25cm .  
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>9788120338944  RS295.00 
<br/><br/><label>Subjects--Index Terms: </label>ECOLOGY 
<br/><br/><label>Dewey Class. No.: </label>577  / RAN/E