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Nissen-Petersen, E. y Lee, M., «Shallow wells with bucketlift», vol. no. 4. ASAL Rainwater Harvesting, Nairobi, Kenya, p. 26 p.: fig., 1990.
Nissen-Petersen, E., «Small earth dam built by animal traction», vol. no. 2. ASAL Rainwater Harvesting, Nairobi, Kenya, p. 27 p.: fig., 1990.
Waterman, M., «Spring protection : a technical guide of how to protect a spring». S.n., S.l., p. 6 p. + 16 p. (annexes): drwng., 1990.
Nissen-Petersen, E. y Lee, M., «Spring protections», vol. no. 6. ASAL Rainwater Harvesting, Nairobi, Kenya, p. iii, 29 p.: fig., 1990.
Nissen-Petersen, E. y Lee, M., «Water tanks with guttering and hand-pump», vol. no. 1. ASAL Rainwater Harvesting, Nairobi, Kenya, p. ii, 52 p. : fig., tab., 1990.
Blair Research Institute -Harare, ZW, «The Blair latrine builders manual». Blair Research Laboratory, Harare, Zimbabwe, p. 24 p.: fig., 1989.
United Kingdom. Committee on Chemicals and Materials of Construction for use in Public Water Supply and Swimming Pools -GB, «Committee on chemicals and materials of construction for use in public water supply and swimming pools : fifteenth statement». United Kingdom, Department of the Environment, Drinking Water Division, London, UK, p. 2 vol. (37, 9 p.), 1989.
Wyatt, A. y Jordan, J., «Estimating operations and maintenance costs for water supply systems in developing countries», vol. no. 48. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. ix, 156 p.: fig., tab., 1989.
Morgan, P., «The handpump phenomenon», Waterlines, an international journal of water, sanitation and waste, pp. p. 2-5: photogr., 1989.
UNICEF Regional Office for South Asia -Kathmandu, NP y Nepal. Ministry of Education and Health -NP, «How to build a pit latrine». Nepal, Ministry of Education and Health, Kathmandu, Nepal, p. 24 p. : ill., 1989.
Chilton, P.J. y Lewis, W.J., «The impact of plastic materials on iron levels in village groundwater supplies in Malawi», Journal of Institution of Water and Environmental Management, pp. p. 82-88: fig., 1989.
Benin. Ministere de la Sante Publique -BJ y World Bank. Regional Water and Sanitation Group for West and Central Africa -Abidjan, CI, Groupe Regional Eau et Assainissement Afrique de l'Ouest / GREA-AO, «Livret guide a l'usage des agents d'hygiene, des services techniques, des enseignants et des personnels de sante : livret II : schemas explicatifs pour la construction des latrines ameliorees a fosses ventilees». MEPS, Materiels d'Enseignement pour les Personnels de Sante, Cotonou, Benin, p. 70 p.: fig., 1989.
Munch-Petersen, N.F., «Low cost sanitation in Bangladesh as related to the Low cost sanitation project covering 84 pourashavas : consultants report». Hoff & Overgaard a/s, Copenhagen, Denmark, p. ca. 127 p.: photogr., tab., 1989.
Institute of Rural Development -Nuku'alofa, TO, «Making a ventilated improved pit latrine», vol. no. 7. University of the South Pacific, Institute of Rural Development, Nuku'alofa, Tonga, p. 12 p.: fig., 1989.
Waller, D.H., «Rain water : an alternative source in developing and developed countries», Water international, pp. p. 27-36 : tab., 1989.
World Bank -Dhaka, BD, AQUA Consultant & Associates -Dhaka, BD, y Local Government Engineering Bureau -Dhaka, BD, «Socio-economic survey on low cost sanitation : final report». AQUA Consultant & Associates, Dhaka, Bangladesh, p. ca. 125 p.: tab., 1989.
USAID -Washington, DC, US y National Water Supply and Drainage Board -Ratmalana, LK, Wastewater treatment, Draft., vol. no. D7. Ratmalana, Sri Lanka: National Water Supply and Drainage Board, 1989, p. vi, 89 p.: fig., tab.
Gampher, C. y Gates, S., «Well construction using curved hollow block». Haribon Foundation, Manila, Philippines, p. 115 p.: fig., tab., 1989.
Stulz, R. y Mukerji, K., «Appropriate building materials : a catalogue of potential solutions». IT Publications, London, UK, p. 430 p.: fig., photogr., 1988.
Zimbabwe. Ministry of Health -ZW, «The double compartment Blair latrine builder's instruction manual». Zimbabwe, Ministry of Health, Harare, Zimbabwe, p. 28 p.: fig., 1988.
Parra M., L., «Letrinas sanitarias aboneras a base de tambor : Chile», in Saneamiento alternativo o alternativas al saneamiento : actas del 1er seminario latinoamericano sobre saneamiento alternativo, Medellin, Colombia, Julio 24-29 de 1987, 1988, pp. P. 89-104 : fig.
SIDA -Stockholm, SE, «Manual for improvement of traditional water sources». Health through Sanitation and Water (HESAWA), Bukoba, Tanzania, p. 14 p.: ill., tab., 1988.
UNICEF -Dhaka, BD y Bangladesh. Department of Public Health Engineering -BD, DPHE, «A report on the development of an iron removal plant for handpump tubewells». UNICEF, Dhaka, Bangladesh, p. 15 p.: fig., photogr. + 1 tech. drwng, 1988.
UNDP -New York, NY, US, «Roof catchments, roof coverings, guttering, downpipes». UNDP Department of Technical Cooperation for Development, Suva, Fiji, p. 49 p.: fig., 1988.
Stark, R., «Well construction manual». Sarvodaya Rural Technical Services, Moratuwa, Sri Lanka, p. 26 p.: fig., 1988.


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