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Reed, B., «Designing simple pipelines», Waterlines, an international journal of water, sanitation and waste, vol. no. 29, pp. p. 15-18: 5 fig., 1 tab., 1991.

McGowan, R., Aubel, J., y Soewandi, R., «Final evaluation report of Care International Indonesia's water and sanitation for a healthier environmental setting (WASHES) project». CARE Indonesia, Jakarta, Indonesia, p. 76 p., 1991.

Lugonzo-Campbell, J.K., «Financially sustainable gravity fed water catchment schemes in Kenya : following a new approach», 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. 361-370.

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Hall, R.E. y Malina, A., «O&M strategies for rural water supply in Zaire : phase II : set up of operational tests», vol. no. 308. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. vi, 65 p., 1990.

Morgan, P., Rural water supplies and sanitation. London, UK: Macmillan, 1990, p. 358 p.: ill.

CIDA -Gatineau, Que, CA, Canadian International Development Agency, SIDA -Stockholm, SE, y UNICEF -New York, NY, US, «Southwest integrated health and water programme : mid term evaluation report». S.n., S.l., p. 57 p.: fig., tab., 1990.

Sarvodaya Rural Technical Services -Moratuwa, LK, «SRTS project report 1990». Sarvodaya Rural Technical Services, Moratuwa, Sri Lanka, p. 45 p. + annexes : fig., photogr., tab., 1990.

Lesaoana, K.W., «Technology selection for Lesotho's rural water supply programme», in Proceedings of the meeting of the Operation and Maintenance Working Group : Geneva, 19-22 June 1990. Volume 2. Case studies on operation and maintenance of rural and urban water supply systems, 1990, pp. p. 32-36.

Winblad, U., Olsson, P., y Savanhu, D., «Zimbabwe : Manicaland health, water and sanitation programme : mid-term assessment and appraisal of proposed continuation». SIDA, Swedish International Development Cooperation Agency, Stockholm, Sweden, p. 59 p.: fig., tab., 1990.

Roark, P., Waldstein, A., y Hodgkin, J., «Approaches for private sector involvement in rural water supply systems», vol. no. 57. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. vii, 35 p., 1989.

Moffat, W.S., Bako, M.D., y O'Sullivan, M.A, «Gravity water supply from protected catchments», in Water, engineering and development in Africa : proceedings of the 15th WEDC Conference, Kano, Nigeria, 3-7 April 1989, 1989, pp. P. 125-128.

UN-HABITAT -Nairobi, KE, United Nations Human Settlements Programme, Malawi gravity-fed rural piped-water programme : a case study. Nairobi, Kenya: UN-Habitat, United Nations Centre for Human Settlements, 1989, p. iv, 42 p.: fig.

Hill, C.B. y Mtawali, K.M., «Malawi : lessons from the gravity-fed piped water system», in Successful development in Africa : case studies of projects, programmes, and policies, 1989, pp. P. 57-78 : fig., tab.

Pardon, M., Wegelin, M., y Galvis C., G., «Prefilters, handpumps and small tanks : key issues for viable rural water supplies?», Water supply : the review journal of the International Water Supply Association, pp. p. SS18.1-SS18.8: fig., tab., 1989.

Boocock, P., «Simple village gravity water supply», in Water, engineering and development in Africa : proceedings of the 15th WEDC Conference, Kano, Nigeria, 3-7 April 1989, 1989, pp. P. 117-120: fig., tab.

Pfiffner, H., «Summary of the gravity water supply design and hydraulic correspondence course». Sarvodaya Rural Technical Services, Moratuwa, Sri Lanka, p. 47 p.: fig., 1989.

Morgan, P., «Blair research bulletins for rural water supply and sanitation». Blair Research Laboratory, Harare, Zimbabwe, p. vii, 343 p.: fig., 1988.

Wyatt, A. y Bates, T., «The operation and maintenance of water supply systems in developing countries : a cost study». Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. 53 p.: fig., tab., 1988.

Heijnen, H.A. y Boot, M.T., Ten years of experience : Community Water Supply and Sanitation Programme, Pokhara, Western Development Region, Nepal, vol. no. 26. The Hague, The Netherlands: IRC, 1988, p. IX, 104 p.: fig., tab.