Vasudevan, N. <br/><br/>
Essentials of environmental science / 
Vasudevan, N. 
 - New Delhi:  Narosa Publishing House,  2006. 
 - xi, 294p.; 24cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9788173197062 
<br/><br/><label>Dewey Class. No.: </label>333.7 VAS