World Health Organization WHO <br/><br/>
Operation and maintenance of urban water supply and sanitation systems : A guide for managers 

 - Geneva  World Health Organization  1994 
 - 101p 
<br/><br/>World Health Organization WHO: Operation and maintenance of urban water supply and sanitation systems : A guide for managers.  Geneva.  World Health Organization, 1994. 92-4-154471-6--(628.1WOR)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>ISBN: </label>92-4-154471-6 
<br/><br/><label>Dewey Class. No.: </label>628.1  / WHO