P. Rogers, De Silva, R., and Bhatia, R.,
“Water is an economic good : how to use prices to promote equity, efficiency, and sustainability”,
Water policy : official journal of the World Water Council, pp. p. 1 - 17 : fig., tab., 2002.
Water and Sanitation Program -Washington, DC, US, WSP,
“Willingness to charge and willingness to pay : the World Bank-assisted China rural water supply and sanitation program”. Water and Sanitation Program, WSP, Washington, DC, USA, p. 8 p. : 1 fig., photogr., 3 tab., 2002.
M. W. Rosegrant, Cai, X., and Cline, S. A.,
World water and food to 2025 : dealing with scarcity. Washington, DC, USA: International Food Policy Research Institute, IFPRI, 2002, p. xxiv, 322 p. : 12 boxes, 42 fig., 106 tab.