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G. Wangen,
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R. S. Schemenauer et Cereceda, P.,
« The chemical composition of fog water supplies in rural areas of Chile, Peru and Oman », in
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H. Hawes, Nicholson, J., et Bonati, G.,
« Children, health and science : child-to-child activities and science and technology teaching », vol. no. 41. UNESCO, Division of Science, Technical and Environmental Education, Paris, France, p. iv, 122 p.: drwng, fig., 1991.
PAHO -Washington, DC, US,
« Cholera in the Americas »,
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WSSCC -Geneva, CH, Water Supply and Sanitation Collaborative Council,
« Collaborative council global forum, Oslo, September 18-20, 1991 : collected papers ». Water Supply and Sanitation Collaborative Council, WSSCC, Geneva, Switzerland, p. 19 papers: fig., tab., maps, 1991.
K. - J. Lundstrom,
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S. Laver,
« Communication skills for trainers : manual for trainers ». University of Zimbabwe, Training Centre for Water and Sanitation, Harare, Zimbabwe, p. iv, 53 p.: ill., 1991.
R. A. Boydell et Quarry, W.,
« Communications for community management of infrastructure », in
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J. Waterkeyn,
« Community mobilization : where is the entry point? »,
Waterlines, an international journal of water, sanitation and waste, p. p. 2-4: ill., photogr., 1991.
A. Sendama et Mbuthia, J.,
« Community participation and water supply : an attempt to provide sustainable water development solutions for Africa : proceedings of the AWN workshop on sustainable water development solutions, Nakuru, 14-20 January 1990 ». African Water Network, Nairobi, Kenya, p. 117 p.: fig., tab., photogr., 1991.