1. Second Water Utilities Data Book, Asian and Pacific Region, 1997;ADB,1997
2. Data Book of Southeast Asian Water Utilities 2005;ADB,2007
3. 2007 Benchmarking Data Book of Water Utilities in India;ADB,2007
4. Asian Sanitation Data Book 2008;ADB,2008
5. Seattle Home Water Conservation Study;Aquacraft,2000