Operation and maintenence of urban water supply and sanitation systems :  a guide for managers. 

 - Geneva :  World Health Organization,  1994. 
 - 102 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>9241544716 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water supply.<br/>Sanitation.<br/>Maintenance.