Biblio

J. Crocker, Saywell, D., Shields, K. F., Kolsky, P., en Bartram, J., “The true costs of participatory sanitation : evidence from community-led total sanitation studies in Ghana and Ethiopia”, vol. 601–602, pp. 1075-1083 : 4 fig., 7 tab., 2017.

P. Kolsky, Perez, E., Vandersypen, W., en L. Jensen, O., “Sanitation and hygiene at the World Bank : an analysis of current activities”, vol. no. 6. World Bank, Washington, DC, USA, p. vii, 19 p. : 4 boxes, 14 fig., 4 tab., 2005.