008270000a22001930004500003000900000005001700009562001800026110007500044710005700119245013800176264004900314300000900363500019400372041000800566650001700574650001500591650001600606040001100622PH-MaWHO20241108112541.0  aWHO/CWS/90.14  aWorld Health Organization. Community Water Supply and Sanitation Unit.  aDeutsche Gesellschaft fnr Technische Zusammenarbeit.  aProceedings of the Meeting of the Operation and Maintenance Working Group, Geneva, 19-22 June 1990 : Volume 1: Report of the Meeting.  aGeneva : bWorld Health Organization,c1990.  a28p.  aOrganized with the support of IRC, International Water and Sanitation Centre, Netherlands, WASH (Water and Sanitation Project, USA, WB/UNDP (UNDP/World Bank Water and Sanitation Programme).  aeng  aWater supply  aSanitation  aMaintenance  aWHOLIS