Sectorial study and National Programming for Community and Rural water supply, Sewerage and Water Pollution Control : :  Current Sewage Disposal methods and Problems / 
World health Organization. 
 - Brazzaville :  World Health Organization,  1972. 
 - 130p. : 
 - Report  3 .
<br/><br/> Include appendix 
<br/><br/>Include bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water treatment