Vasudevan N  <br/><br/>
Essentials of Environmental Science 
/by N.Vasudevan  
 - New Delhi  Norsa Publishing House   2006 
 - xi,294p. 
<br/><br/><label>ISBN: </label>978-81-7319-706-2 
<br/><br/><label>Dewey Class. No.: </label>333.707  / VAS/E