M.G.Chitkara <br/><br/>
Environmental protection 
by Arvind Kumar 
 - New Delhi  Daya Publishing House  2007 
 - 322 P  25 cm. 
<br/><br/> Hardcover. 
<br/><br/><label>ISBN: </label>9788131314562 
<br/><br/><label>Dewey Class. No.: </label>628.5