Singh, P P. <br/><br/>
Environment and pollution education / 
By P P Singh, Sandhir Sharma. 
 - 1st Ed. 
 - New Delhi :  DEEP AND DEEP PUBLICATIONS PVT LTD,  2005. 
 - 434pp.p.p.p.p. ;  00 cm. 
<br/><br/><label>Dewey Class. No.: </label>363.700  / SIN