World Bank -Washington, DC, US,
« Serving the poor : how can partnerships increase access and improve efficiency? ». World Bank, Water and Sanitation Division, Washington, DC, USA, p. vi, 78 p. : fig., photogr., tab., 1999.
Durban water Recycling -Durban, ZA, DWR,
« Vivendi water : Durban water recycling project ». Durban Water Recycling (DWR), Durban, South Africa, p. ca. 20 p. fig., photogr., 1999.