Kumaravelan, R. and Anandan, P.  <br/><br/>
Environmental science and engineering / 

 - New Delhi,   Scitech Publication,  c2006. 
 - I-8 p. ;  ill. ;  24 cm.  
<br/><br/><label>ISBN: </label>8188429821 
<br/><br/><label>Dewey Class. No.: </label>620.819