World Health Organization <br/><br/>
Drinking-water and sanitation, 1981-1990  A way to health 

 - World Health Organization, Geneva  1981 
 - iii,56p 
<br/><br/><label>ISBN: </label>92 4 156068 1 
<br/><br/><label>Dewey Class. No.: </label>614.772 W.H.O.