WORLD Health Organization <br/><br/>
Operation and maintenance of urban water supply and sanitation systems ; a guide 

 - Geneva  WHO  1994 
 - ix, 102 p. 
<br/><br/><label>ISBN: </label>9241544716 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Drinking water<br/>Water supply<br/>Water safety<br/> Water saniation
<br/><br/><label>Dewey Class. No.: </label>363.123  / WOR