"Ramakrishnan , P.S." <br/><br/>
Ecology and sustainable development 

 - New Delhi  National Book Trust  2004 
 - 198p.- 
<br/><br/><label>ISBN: </label>8123736223 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>333.79 RAM