D. T. Lauria, Wright, A. M., Hughes, J., Choe, K., Whittington, D., et Swarna, V.,
« Household demand for improved sanitation services : a case study of Kumasi, Ghana », vol. no. 3. World Bank, Water and Sanitation Division, Washington, DC, USA, p. ix, 118 p.: 17 fig., 24 tab., 1992.
D. Whittington, Lauria, D. T., Wright, A. M., Choe, K., Hughes, J., et Swarna, V.,
« Households' willingness to pay for improved sanitation in Kumasi, Ghana: results of a contingent valuation study », vol. SW 7. World Bank, Water and Sanitation Division, Washington, DC, USA, p. 4 p.: 1fig., 1 tab., 1992.
J. Briscoe,
« Poverty and water supply : how to move forward »,
Finance & development, p. p. 16-19: 2 box., 1 fig., 1 photogr., 1992.
L. Macharia,
Sanitation options for Kibera low-income area in Nairobi, vol. no. 53. Tampere, Finland: Tampere University of Technology, Institute of Water and Environmental Engineeri, 1992, p. 97 p.: 25 fig., 5 tab.
J. Jigabha,
Water metering development in Dar es Salaam, Tanzania, vol. no. 52. Tampere, Finland: Tampere University of Technology, Institute of Water and Environmental Engineeri, 1992, p. 73 p.: 22 fig., 1 map, 21 tab.
A. Altaf, Jamal, H., et Whittington, D.,
« Willingness to pay for water in rural Punjab, Pakistan », vol. no. 4. World Bank, Washington, DC, USA, p. xv, 161 p.: fig., map, tab., 1992.