Programme on exchange and transfer of information (POETRI) /    
Inte rnational Reference Centre for Community Water Supply and Sanitation. 
 - Rijswijk, Netherlands :   The Centre,   1981. 
 - Various pagings ;    24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water supply --Information services --Developing countries ----Hand books, manuals.<br/>Sanitation --Information services --Africa.----Hand books, manuals.
<br/><br/><label>Dewey Class. No.: </label>628.109172