Biblio

S. A. Esrey, Potash, J. B., Roberts, L., and Shiff, C., “Effects of improved water supply and sanitation on ascariasis, diarrhoea, dracunculiasis, hookworm infection, schistosomiasis, and trachoma”, Bulletin of the World Health Organization, pp. p. 609-621: tab., 1991.

S. A. Esrey, Potash, J. B., Roberts, L., and Shiff, C., “Health benefits from improvements in water supply and sanitation : survey and analysis of the literature on selected diseases”, vol. no. 66. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. ix, 73 p.: fig., tab., 1990.