Kumaran, Vasantha T. Norbert, Antony S. <br/><br/>
Environmental Pollution. 

 - 1st, Ed. 
 - Colombo :  Kumaran Book House,  2007. 
 - 69 p. 
<br/><br/><label>ISBN: </label>978955659079x 
<br/><br/><label>Dewey Class. No.: </label>910  / KUM