Masters, Gilbert M. and Ela, Handell P. <br/><br/>
Introduction to environmental engineering and science / 

 - 2 nd. 
 - New Delhi,  Prenntice Hall,  c2008. 
 - xii,708 p. ;  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>9788120236919 
<br/><br/><label>Dewey Class. No.: </label>628.21