Ray, Bill T. <br/><br/>
Environmental engineering / 
by Bill T. Ray. 
 - Boston, Mass. :  PWS,  1995. 
 - xix, 496 p. : ill. 
 - PWS Series in Engineering. .
<br/><br/> Includes bibliographical references and index.  Contents : Laws and regulations--Ecology and the environment. 
<br/><br/><label>ISBN: </label>0534206522 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental engineering.<br/>Environmental sciences.