P. V. Rao <br/><br/>
Textbook of Environmental Engineering 
by P. V. Rao 
 - New Delhi  PHI  2002 
 - 175 
<br/><br/><label>ISBN: </label>8120319303 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry
<br/><br/><label>Dewey Class. No.: </label>105.23  / Rao