Ramakrishnan, P S <br/><br/>
Ecology and Sustainable Development 

 - New Delhi  National Book Trust  2001 
 - 198p 
<br/><br/> includes index and biblioraphy 
<br/><br/><label>ISBN: </label>8123736223     70 
<br/><br/><label>Dewey Class. No.: </label>N53  / R141