Rana, S. V.S. <br/><br/>
Essentials of ecology and environmental science/ 
S.V.S Rana 
 - New Delhi :  Prentice-hall of India,  2003 
 - Eastern Economy ed. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>8120323203 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology.<br/>Environmental Science.