Asthana, D.K. and Asthana, Meera <br/><br/>
A Textbook of Environmental Studies 

 - New Delhi  S.Chand & Company Ltd.  2006 
 - 460 
<br/><br/><label>ISBN: </label>9788121927642 
<br/><br/><label>Subjects--Personal Names: </label> Environment Science 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environment Science