Verma, S.B  & Singh , Shiv Kumar <br/><br/>
Environmental protection and development 

 - New Delhi  Deep & Deep Pub  0 
 - 379p. 
<br/><br/><label>ISBN: </label>81-7629-567-1 
<br/><br/><label>Dewey Class. No.: </label>363.7   Ver. P5