World Health Organization <br/><br/>
Operation and maintenence of urban water supply and sanitation systems : a guide for managers 

 - Geneva  World Health Organization  1994 
 - 102p. 
<br/><br/><label>ISBN: </label>9241544716 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water supply
<br/><br/><label>Dewey Class. No.: </label>363.61 WOR