1991
H. Christensen, Gray, K., Kleemeier, E., Loft, M., y Schaumburg-Mueller, H.,
«Evaluation report : drinking water projects in India». DANIDA, Ministry of Foreign Affairs, Copenhagen, Denmark, p. : 4 fig., 19 tab., 1991.
J. Naugle,
«Forage manuel de puits tuyau en PVC pour le maraichage». Lutheran World Relief, Niamey, Niger, p. 31 p.: 10 fig., 18 tech. drwngs, 1991.
J. Naugle,
«Hand augered garden wells». Lutheran World Relief, Niamey, Niger, p. 29 p.: 10 fig., 18 tech. drwngs, 1991.
M. Detay, Poyet, P., y Brisson, E.,
«Hydrolab : le systeme expert d'aide a l'implantation de forages : concepts, techniques et application au Burkina Faso». Comite Interafricain d'Etudes Hydrauliques (CIEH), Ouagadougou, Burkina Faso, p. 120 p. : 34 fig., 5 tab., 1991.
J. Pickford,
«Infrastructure, environment, water and people : proceedings of the 17th WEDC Conference, United Nations Centre for Human Settlement (Habitat), Nairobi, Kenya, 19-23 August 1991». Water, Engineering and Development Centre, Loughborough University of Technology, WEDC, Loughborough, UK, p. xvi, 302 p.: fig., tab., 1991.
J. E. Gould,
Rainwater catchment systems for household water supply, vol. no. 32. Bangkok, Thailand: Environmental Sanitation Information Center, ENSIC, 1991, p. iii, 57 p.: 12 fig., 14 photogr., 4 tab.
L. Lovei y Whittington, D.,
«Rent seeking in water supply : discussion paper». World Bank, Water and Sanitation Division, Washington, DC, USA, p. 25 p.: 4 fig., 2 tab., 1991.
G. J. Alaerts, Blair, T. L., y Hartvelt, F. J. A.,
«A strategy for water sector capacity building : proceedings of the UNDP symposium, Delft, 3-5 June, 1991», vol. 24. IHE (International Institute for Infrastructural, Hydraulic and Environmental Engineering), Delft, The Netherlands, p. 191 p. : fig., tab., 1991.
D. Hall y Adams, M.,
«Water, sanitation, hygiene and health in the Qabane Valley, Lesotho». Tebellong Hospital, Primary Health Care Department, Qacha's Nek, Lesotho, p. x, 102 p.: 9 fig., 30 tab., 34 photogr., 1991.