Guidelines drinking-water quality / 
World Health Organization. 
 - 4th ed. 
 - Geneva :  World Health Organization,  2011. 
 - xxiii, 541 p. ;  23 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>978-92-4-154815-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Patable water--Standards<br/>Water--standards<br/>Water quality<br/>Guidelines