WHO <br/><br/>
Guidelines for drinking-water quality : addendum microbiological agents in drinking water 

 - 2nd ed 
 - auth., Geneva  2002 
 - vii,142p 
<br/><br/><label>ISBN: </label>92-4-154535-6 
<br/><br/><label>Dewey Class. No.: </label>614.772 WHO