Batra, S.K. <br/><br/>
Environental studies  Environental studies._4th Ed, New Delhi : Taxman publications (p.) Ltd., 2018 
S.K. Batra 
 - 4th 
 - New Delhi  Taxman publications (p.) Ltd.  2018 
<br/><br/><label>Dewey Class. No.: </label>301.31