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

 - 4th ed. 
 - New Delhi :  Prentice Hall of India ,  2010. 
 - xv+488 
<br/><br/><label>ISBN: </label>812032773X 
<br/><br/><label>Subjects--Index Terms: </label>Essentials of Ecology And Environmental Science