RAO ,P.V. <br/><br/>
PRINCIPLES OF ENVIRONMENTAL SCIENCE AND ENGINEERING 

 - NEW DELHI  PHI-Learning  2006 
 - x+276p.,24X14Cms. 
<br/><br/><label>ISBN: </label>81-203-2893-0 
<br/><br/><label>Dewey Class. No.: </label>628 R215