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Heide, J. van der, Orozco, J.G., y Wasbeek, D. van, Evaluacion hidraulica de plantas potabilizadoras de filtracion rapida en Nicaragua, vol. no. 40. Delft, The Netherlands: Delft University of Technology, Department of Civil Engineering, 1991, p. 34 p. : 16 fig., 7 tab.
Faulkner, R.D. y Lambert, R.A., «Household pumps from the informal sector», in Infrastructure, environment, water and people : proceedings of the 17th WEDC Conference, United Nations Centre for Human Settlement (Habitat), Nairobi, Kenya, 19-23 August 1991, 1991, pp. P. 185-188: 2 fig., 1 tab.
McGowan, R., Adam Omer, S., Abdelrahman Hamza, A., Omer Eltayeb, A., Yassin Ahmed, N., y Hodgkin, J., «Meeting rural pumping needs in Sudan : an analysis of pumping system choice (diesel, wind, or solar)». Associates in Rural Development, Burlington, VT, USA, p. ca. 180 p.: fig., tab., 1991.
Ikumi, P. y Oenga, I.O., «Mid-term review for the Kenya-Finland Western Water Supply Programme : evaluative report of the NETWAS field study». Network for Water and Sanitation International (NETWAS), Nairobi, Kenya, p. vii, 27 p.: fig., 1991.
Ikumi, P. y Oenga, I.O., «Mid-term review for the Kenya-Finland western water supply programme : field survey report». Network for Water and Sanitation International (NETWAS), Nairobi, Kenya, p. viii, 92, 8 p.: fig., tab., 1991.
Guene, O., Tandia, C., y Toure, C.S., «Qualite des eaux des citernes de captage d'eau de pluie au Sahel», in Rainwater catchment for future generations : proceedings of the 5th International Conference on Rain Water Cistern Systems, Keelung, Taiwan, 4-10 August 1991, 1991, pp. P. 69-79 : 7 fig., 4 tab.
Nichols, P., Social survey methods : a fieldguide for development workers. Oxford, UK: Oxfam, 1991, p. 131 p.: fig.
Hart, C., «A tale of two latrines», Source, pp. p. 24-26: photogr., 1991.
Oladepo, O., Oyejide, C.O., y Oke, E.A., «Training field workers to observe hygiene-related behaviour», World health forum, pp. p. 472-475, 1991.
Ramasubban, R., Singh, B., Bhatia, R., Griffin, C.C., Kim, C., y Briscoe, J., «Willingness to pay for water in Kerala, India». Centre for Social and Technological Change, Bombay, India, p. vii, 65 p.: 18 fig., 24 tab., 1991.
Rana, I., Developing a pictorial language : an experience of field testing in rural Orissa : a guide for communicators. New Delhi, India: DANIDA, Ministry of Foreign Affairs, 1990, p. 40 p.: fig.
Getachew, W., Disinfection practices in urban water supply in Ethiopia, vol. no. 45. Tampere, Finland: Tampere University of Technology, Institute of Water and Environmental Engineeri, 1990, p. 73 p.: 27 fig., 14 tab.
CINARA -Cali, CO, «Evaluacion de sistemas de abastecimiento de agua con plantas de tratamiento administrado por comunidades : informe final». Centro Inter-Regional de Abastecimiento y Remocion de Agua, Cali, Colombia, p. 3 vol. (ca. 470 p.): fig., tab., 1990.
FINNIDA -Helsinki, FI, Kefinco -Helsinki, FI, y Kenya. Ministry of Water Development -KE, «Kenya-Finland Western Water Supply Programme : quarterly review Jul 90 - Sep 90». FINNIDA, Ministry of Foreign Affairs, Helsinki, Finland, p. 19 p. + annexes (ca. 48 p.) : fig., tab., 1990.
Meridian Corporation -Alexandria, VA, US y IT Power -Eversley, GB, «Learning from success : photovoltaic-powered water pumping in Mali». US Committee on Renewable Energy Commerce and Trade, Washington, DC, USA, p. viii, 59 p.: fig., map, tab., 1990.
Verma, B.L. y Srivastava, R.N., «Measurement of the personal cost of illness due to some major water-related diseases in an Indian rural population», International journal of epidemiology, pp. p. 169-176: 6 tab., 1990.
Ramakrishna, J., Sridhar, M.K.C., Adeniyi, J.D., y Brieger, W.R., «Monitoring use of monofilament nylon water filters for Guineaworm control in a rural Nigerian community», International quarterly of community health education, pp. p. 5-18: tab., 1990.
Folkard, G.K., Sutherland, J.P., y Grant, W.D., «Natural coagulants for appropriate water treatment : a novel approach», Waterlines, an international journal of water, sanitation and waste, pp. p. 30-32: fig., photogr., 1990.
Folkard, G.K., Sutherland, J.P., y Grant, W.D., «Natural coagulants for small scale water treatment : potential applications», ASEP newsletter, pp. p. 1-2, 10, 14: fig., tab., 1990.
Rollins, J., «Nepal made hydraulic ram pump : problems and solutions», Hydronet, pp. p. 10-11: tab., ill., 1990.
UNICEF Regional Office for South Central Asia -New Delhi, IN, World Bank. Regional Water and Sanitation Group for South Asia -New Delhi, IN, y India. Rajiv Gandhi National Drinking Water Mission -IN, «Report on field testing in Coimbatore of the standard India Mark II and open top cylinder India Mark III pumps». World Bank Regional Water and Sanitation Group South Asia, New Delhi, India, p. ca. 130 p.: fig., tab., 1990.
Nanavaty, R. y Buch, P., «Salt farmers of Santhalpur Taluka : field-study of their working and living condition : October - December 1989». Self Employed Women's Association, SEWA, Ahmedabad, India, p. 24 p., 1990.
Woto, T., Yates, R., y Tlhage, J.T., Solar-powered desalination : a case study from Botswana, vol. 65e. Ottawa, Ont, Canada: International Development Research Centre (IDRC), 1990, p. viii, 55 p.: fig., tab., photogr.
Joshi, B., «Technical assistance to the Bolgatanga Community Water and Sanitation Management Pilot Project : terminal report». Ghana Water and Sewerage Corporation, Accra, Ghana, p. 4 p., 1990.
Meghji, M.R. y Merinyo, G., «Water based pollution in Dar es Salaam», in Environmental pollution and its management in Eastern Africa : proceedings of a symposium organized by the Faculty of Science, University of Dar es Salaam, Dar es Salaam, September 11-14th, 1989, 1990, pp. P. 103-128: 2 fig., 13 tab.