Deswal, S <br/><br/>
A basic course in environmental studies / 
S Deswal 
 - New delhi:  Dhanpat rai & company,  2010 
 - 490 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental
<br/><br/><label>Dewey Class. No.: </label>628  / DES/A