Techniques for the collection and reporting of data on community water supply : report of a WHO scientific group [meeting held in Geneva from 24 to 30 August 1971]. 

 - 24p. 
 - (WHO technical report series ; 490) .
<br/><br/><label>ISBN: </label>92-4-120490-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water supply<br/>Data collection<br/>Information services