1999
D. Del Porto y Steinfeld, C.,
The composting toilet system book : a practical guide to choosing, planning and maintaining composting toilet systems,a water-saving, pollution-preventing alternative. Concord, MA, USA: Center for Ecological Pollution Prevention, 1999, p. 234 p. : fig., photogr.
EPA -Washington, DC, US. Office of Water,
«Composting toilets». US Environmental Protection Agency (EPA), Washington, DC, USA, p. 7 p. : 1 fig., 1 tab., 1999.
D. Manz,
«CWF household filter». Samaritan's Purse, International Relief, p. 58 p. : photogr., tabs., 1999.
G. G. C., J. M., L., y Visscher, J. T.,
Filtracion en multiples etapas : tecnologia innovativa para el tratamiento de agua, vol. no. 34-S. Cali, Colombia: CINARA, 1999, p. 197 p. : 68 fig., 60 tab.
D. K. D. A. N. I. D. A. - Copenhagen,
«Gender and water supply and sanitation». DANIDA, Ministry of Foreign Affairs, Copenhagen, Denmark, p. 16 p. : tab., 1999.
J. Collin,
«Lessons learned from Village Level Operation and Maintenance (VLOM)», vol. no. 162. Water and Environmental Health at London and Loughborough (WELL), London, UK, p. 20 p. : 5 boxes, 1999.
R. A. Boydell,
«Making rural water supply and sanitation projects sustainable»,
Waterlines, an international journal of water, sanitation and waste, pp. p. 2-4 : 1 ill., 2 photogr., 1999.
P. Iyer,
«Mechanisms for sustainability in a supply-driven environment»,
Waterlines, an international journal of water, sanitation and waste, pp. p. 25-28 : 1 box, 2 photogr., 2 tab., 1999.
K. K. Rao,
«Performance study on o&m of regional water supply project in A.P., India», vol. no. 068. IHE (International Institute for Infrastructural, Hydraulic and Environmental Engineering), Delft, The Netherlands, p. ix, 92 p. : fig., tab., 1999.
H. Lockwood,
«Post-war restructuring : decentralizing Nicaragua's rural O&M»,
Waterlines, an international journal of water, sanitation and waste, pp. p. 24-27 : 1 map, 4 photogr., 1999.
G. F. Craun, Cotruvo, J. A., y Hearne, N.,
«Providing safe drinking water in small systems : technology, operations, and economics : proceedings of the 1st international symposium on safe drinking water in small systems : technology, operations, economics, Washington, DC, May 10-13, 1998». Lewis, Boca Raton, FL, USA, p. 650 p. : fig., photogr., tab., 1999.
World Bank -Washington, DC, US y Water and Sanitation Program -Washington, DC, US, WSP,
«Small towns and multi-village initiatives». Water and Sanitation Program, WSP, Washington, DC, USA, p. 6 p. : photogr., 1999.
I. A. Mtulia,
«Status of water supply and sanitation sectors in Tanzania». Tanzania, Ministry of Water, Dar es Salaam, Tanzania, p. 12 p., 1999.