Duggal, K. N. <br/><br/>
Elements of environmental engineering / 
K. N. Duggal. 
 - New Delhi :  S. Chand,  2007. 
 - xvii, 440  p. 
<br/><br/><label>ISBN: </label>8121915473 :  KES 390 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental engineering.