| 1.
| Reuse of wastewater in agriculture : a guide for planners (Arabic) | 1994/04/30 | 13315 | Water & Sanitation Discussion Paper |
| 4.
| Community management of rural water supply and sanitation services (English) | 1990/01/01 | 9358 | Water & Sanitation Discussion Paper |
| 6.
| Do current water subsidies reach the poor? (English) | 2006/01/01 | 34961 | Water & Sanitation Discussion Paper |
| 8.
| Explanatory notes on key topics in the regulation of water and sanitation services (English) | 2006/06/01 | 37529 | Water & Sanitation Discussion Paper |