American Water Works Association. <br/><br/>
Water quality and treatment :  a handbook of community water supplies / 
American Water Works Association, Raymond D. Letterman, technical editor. 
 - 5th ed. 
 - New York :  McGraw-Hill,  c1999. 
 - x, 1 v. (various pagings) :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0070016593 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water--Purification--United States.<br/>Water quality.<br/>Water-supply--United States.