Das Mohapatra, Gourkrishna <br/><br/>
Environment and Ecology  
Gourkrishna Das Mohapatra  
 - 3rd ed. 
 - Kolkata   Vikas   2009 
<br/><br/><label>ISBN: </label>978-8125929024  195 
<br/><br/><label>Dewey Class. No.: </label>333.7  / D229