World Health Organization <br/><br/>
International drinking water supply and sanitation decade (IDWSSD : 1981-1990)  decade commencement report 

 - World Health Organization, New Delhi  1983 
 - vi,107 
<br/><br/><label>Dewey Class. No.: </label>R614.772 W.H.O./S.E.A.R.O.