World Health Organization <br/><br/>
Guidelines for safe recreational water enivronments vol.1  coastal and fresh waters 

 - World Health Organization, (s.l.)  2003 
 - xxxiii,219 
<br/><br/><label>ISBN: </label>92-4-154580-1 
<br/><br/><label>Dewey Class. No.: </label>R363.7394 W.H.O.