S. A. Esrey,
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D. R. Hopkins,
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D. W. F. Miller,
“Report on IDWSSD impact on schistosomiasis”, vol. 6. World Health Organization, Community Water Supply & Sanitation Unit, Geneva, Switzerland, p. 19 p.: fig., photogr., tab., 1990.
S. Fry en Frelick, G.,
“A training guide on hygiene education”, vol. no. 60. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. ca. 210 p., 1990.
P. Edwards en Pullin, R. S. V.,
“Wastewater-fed aquaculture : proceedings of the International Seminar on Wastewater Reclamation and Reuse for Aquaculture, Calcutta, India, 6-9 December, 1988”. Environmental Sanitation Information Center, ENSIC, Bangkok, Thailand, p. xxix, 296 p.: fig., tab., 1990.
WHO -Geneva, CH, World Health Organization,
“Water supply, sanitation and health in rural areas : report of a consultation of the WHO Working Group on Water, Sanitation and Health, Geneva, 27-28 June 1990”. World Health Organization (WHO), Geneva, Switzerland, p. ii, 26 p., 1990.
S. Cairncross, Aziz, K. M. A., Huttly, S. R. A., Minnatullah, K. M., Hassan, Z., Patwary, M. K., Rahaman, M. M., en Hoque, B. A.,
“Water supply, sanitation and hygiene education : report of a health impact study in Mirzapur, Bangladesh”, vol. 1. UNDP-World Bank Water and Sanitation Program, Washington, DC, USA, p. xiii, 91 p.: fig., tab., 1990.