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James, W.P., «Hydropower valve : a new application for an old device», Journal American Water Works Association, 1998.
Latorre M., J., Wegelin, M., y Galvis C., G., «La filtracion gruesa en el tratamiento de agua de fuentes superficiales», vol. no. 4/98. SKAT (Swiss Centre for Development Cooperation in Technology and Management), St. Gallen, Switzerland, p. vi, 170 p. : fig., photogr., tab., 1998.
Visscher, J.T., Latorre M., J., y Galvis C., G., Multi-stage filtration : an innovative water treatment technology, vol. no. 34-E. The Hague, The Netherlands: IRC, 1998, p. xiii, 165 p. : 68 fig., 60 tab.
Pisani, J.E. du, Operation and maintenance of solids-free sewer (SFS) systems in South Africa : guidelines for engineers, vol. no. TT 97/98. Pretoria, South Africa: Water Research Commission, WRC, 1998, p. viii, 19 p. : 1 tab.
Whitby, G., «Primary community school construction», Appropriate technology, pp. p. 30-32 : 1 box, 1998.
Kone, D., «Problématique de l'épuration des eaux usées dans le contexte Ouest-africain», pp. p. 177-184 : tabs., 1998.
Hai, M.T., Water harvesting : an illustrative manual for development of microcatchment techniques for crop production in dry areas, vol. no. 16. Nairobi, Kenya: SIDA, Swedish International Development Cooperation Agency, 1998, p. viii, 54 p. : fig., map, plates, tab.
Mara, D.D., Design manual for waste stabilization ponds in India. Leeds, UK: Lagoon Technology International, 1997, p. viii, 125 p. : fig., photogr., tab.
Lavanchy, D., «Distribution networks : technologies and their application to design and operation», Aqua : journal of water supply research and technology, pp. p. 99-105 : 9 fig., 1997.
Bombas de Mecate -Managua, NI, «[Documents on the technology transfer of the rope pump]». Bombas de Mecate, Managua, Nicaragua, p. 5 vol., 1997.
Mvula Trust -Braamfontein, ZA, «Guidelines to community managed water and sanitation services. Module 7. Managing procurement». Mvula Trust, Braamfontein, South Africa, p. 21 p. : boxes, drwgs, 1997.
Mvula Trust -Braamfontein, ZA, «Guidelines to community managed water and sanitation services. Module 13. Sanitation». Mvula Trust, Braamfontein, South Africa, p. 13 p. : boxes, fig., drwgs, 1997.
Mvula Trust -Braamfontein, ZA, «Guidelines to community managed water and sanitation services. Module 6. Construction contracts». Mvula Trust, Braamfontein, South Africa, p. 9 p. : boxes, drwgs, 1997.
Calorama -Elburg, NL, «Hand drilled wells», vol. no. 3. Calorama Rural Development Service, Elburg, The Netherlands, p. 65 p. : fig., photogr., tab., tech. drwngs., 1997.
Brandberg, B., Latrine building : a handbook for implementing the SanPlat system. London, UK: IT Publications, 1997, p. viii, 168 p. : fig.
Silva S., H. y Tene, C., «Letrina MFC - OPS/OMS». Pan American Health Organization (PAHO), Tegucigalpa, Honduras, p. 4 p. : 2 photogr., 2 tab., 1997.
Finland. Ministry of Foreign Affairs. Department for International Development Cooperation -FI y Beni Suef (Governorate) -EG, «Regional water supply and sanitation project in Beni Suef : manual for construction, operation and maintenance of double pit latrines». Finland, Department for International Development Cooperation, Helsinki, Finland, p. 38 p. : ill., tech drwngs., 1997.
DHV -Amersfoort, NL, AQUA Consultant & Associates -Dhaka, BD, y DEVCONsultants -Dhaka, BD, «Sanitation (mission 2) : public toilets and community latrines : review and evaluation of existing designs proposals for new design concepts : technical report». DHV, Amersfoort, The Netherlands, p. iv, 50 p. + 19 p. annexews : fig., tab., techn.drwng., 1997.
UNICEF -Dhaka, BD y Bangladesh. Department of Public Health Engineering -BD, DPHE, «School sanitation programme». UNICEF, Dhaka, Bangladesh, p. 20 p. : 2 fig, 2 tab., 5 techn. drwngs, 1997.
Sulabh International -Patna, IN, «Sulabh international marches from urban to rural areas». Sulabh International, New Delhi, India, p. 7, xxii p. : tech. drwngs., photogr., 1997.
Shaw, R. y Pickford, J., «Technical brief no. 54 : emptying latrine pits», Waterlines, an international journal of water, sanitation and waste, pp. p. 15-18 : ill., 1997.
Winblad, U., Towards an ecological approach to sanitation, vol. no. 5. Stockholm, Sweden: SIDA, Swedish International Development Cooperation Agency, 1997, p. i, 13 p. : drwngs.
Kidd, R., «Trainer's guide for water board training : small towns water supply and sanitation project». Community Water and Sanitation Agency, Accra, Ghana, p. ii, 136 p. : ill., 1997.
Graham, N. y Collins, R., «Advances in slow sand and alternative biological filtration». Wiley, Chichester, UK, p. xvii, 461 p. : fig., tab., 1996.
Saidam, M.Y. y Butler, D., «Algae removal by horizontal flow rock filters», in Advances in slow sand and alternative biological filtration, 1996, pp. P. 327-339 : 8 fig., 2 tab.