Rao, P.Venugopala., <br/><br/>
Principles of environmental science and engineering 

 - New Delhi  PHI Learning  2006 
 - xii,276p.:  24 cm. 
<br/><br/> Includes Index 
<br/><br/><label>ISBN: </label>9788120328938 
<br/><br/><label>Dewey Class. No.: </label>628.5 RAO