Venugopala Rao, P <br/><br/>
Textbook of environmental engineering 

 -   Prentice - Hall of India, Pvt. ltd., New Delhi  2007 
 - 268 
<br/><br/><label>ISBN: </label>4550 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Sanitary and municipal engineering, Environmental protection engineering
<br/><br/><label>Dewey Class. No.: </label>628  VEN-T