1991
EPA -Washington, DC, US,
«Manual of individual and non-public water supply systems». US Environmental Protection Agency (EPA), Washington, DC, USA, p. vi, 181 p.: fig., tab., 1991.
EPA -Washington, DC, US,
«Manual of small public water supply systems». US Environmental Protection Agency (EPA), Washington, DC, USA, p. vi, 211 p.: fig., tab., 1991.
D. Laredo,
«Principles of tariff design for water and wastewater services», vol. no. 348. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. v, 24 p.: fig., 1991.
1990
I. L. Nyumbu, Scott, M., Seager, M., y Wang, C.,
«Agua potable y saneamiento : manual de principios y metodos financieros». World Health Organization, Community Water Supply & Sanitation Unit, Geneva, Switzerland, p. iv, 100 p.: fig., 1990.
I. L. Nyumbu, Scott, M., Seager, M., y Wang, C.,
«Approvisionnement public en eau et assainissement : principes et methodes de gestion financiere manuel». World Health Organization, Community Water Supply & Sanitation Unit, Geneva, Switzerland, p. iv, 100 p.: fig., 1990.
N. Ministry o NP,
«Design guidelines for rural water supply systems». Nepal, Ministry of Housing and Physical Planning, Dept. of Water Supply and Sanitation, Kathmandu, Nepal, p. 28 p. + 36 p. ann.: tab., 1990.
J. Pickford,
Developing world water. London, UK: Grosvenor Press, 1990, p. 468 p.
W. Getachew,
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.
I. L. Nyumbu,
«Financing operation and maintenance of water supply systems in Zambia and Malawi», 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. 42-48.
K. V. Ellis,
«Potable water for the developing world : some of the problems»,
Aqua : journal of water supply research and technology, pp. p. 368-375, 1990.
S. C. Tsvakwi,
«Sector paper on water supply and sanitation in urban areas», in
Decade consultative meeting on water supply and sanitation 1981-90 : Harare, 26-30 November 1990 : proceedings and resolutions, 1990, p. Ca. 15 p.: tab.
D. T. Lauria,
«Strategy for planning periurban water systems : a case study from Guatemala», vol. no. 310. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. vi, 55 p.: fig., tab., 1990.
J. Pickford,
«Urgent urban water and waste problems»,
Waterlines, an international journal of water, sanitation and waste, pp. p. 2-5: photogr., 1990.
I. L. Nyumbu, Scott, M., Seager, M., y Wang, C.,
«Water supply and sanitation : handbook of financial principles and methods». World Health Organization, Community Water Supply & Sanitation Unit, Geneva, Switzerland, p. iv, 100 p.: fig., 1990.
F. I. F. I. N. N. I. D. A. - Helsinki y Zanzibar (State). Ministry of Water, Energy, Construction, Land and Environment -TZ,
«Zanzibar urban water supply development plan : progress report : 2nd quarter 1990». Tanzania, Ministry of Water, Energy, Construction, Lands and Environment, Zanzibar Town, Tanzania, p. 8 p. + 16 p. annexes: tab., 1990.