World Bank -Washington, DC, US,
«Benchmarking water and sanitation utilities». World Bank, Water and Sanitation Division, Washington, DC, USA, p. various documents / sheets, 1999.
World Bank -Washington, DC, US,
«Creating performance incentives through regulation and benchmarking», presented at the 1999-04-08, Washington, DC, USA, 1999, p. vi, 72 p.
