Verma , S.B. and singh , Shiva Kumar <br/><br/>
Environmentaln Protection and development 

 - New Delhi  Deep & Deep Publication Pvt. Ltd.  2005 
 - 379p. 
<br/><br/><label>ISBN: </label>81-7629-567-1 
<br/><br/><label>Dewey Class. No.: </label>363.7   Ver.P5