Duggal, K. N.. , <br/><br/>
Elements of environmental engineering / 
K. N. Duggal. 
 - 6th ed. 
 - 504 pages :  illustrations ;  21 cm. 
<br/><br/><label>ISBN: </label>8121915473 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental engineering.<br/>Sanitary engineering.
<br/><br/><label>LC Class. No.: </label>TA170   / .D84 2002