World Health Organization <br/><br/>
Guidelines for drinking - water quality vol 1 recommendations 

 - 2nd ed 
 - World Health Organization, Geneva  1993 
 - x,188p 
<br/><br/><label>ISBN: </label>92 4 154460 0 
<br/><br/><label>Dewey Class. No.: </label>614.772 W.H.O.