Ray, Bill T. <br/><br/>
Environmental engineering / 
Bill T. Ray. 
 - New York :  PWS Pub. Co.,  c1995. 
 - xix, 496 p. :  ill., maps ;  25 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0534206522 (acidfree paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental engineering.<br/>Environmental sciences.
<br/><br/><label>LC Class. No.: </label>TD146  / .R38 1995