Ecology and environmental biology 
Dr. S.S. Purohit, Dr. Ashok K. Agrawal 
 - India.  Publisher : Student Edition.  2004. 
 - 644 P. 
<br/><br/><label>ISBN: </label>81-88826-07-3 
<br/><br/><label>Dewey Class. No.: </label>577