1991
M. Ince et Bell, M.,
« Gender sensitivity in development », in
Infrastructure, environment, water and people : proceedings of the 17th WEDC Conference, United Nations Centre for Human Settlement (Habitat), Nairobi, Kenya, 19-23 August 1991, 1991, p. P. 53-56: 2 fig.
V. P. Mnyanga,
« Ground water contamination by pit latrines : Dar-es-salaam (Manzese squatter area) case study », vol. no. 39. IHE (International Institute for Infrastructural, Hydraulic and Environmental Engineering), Delft, The Netherlands, p. 115 p.: fig., tab., 1991.
UNDTCD -New York, NY, US,
Ground water in Western and Central Europe, vol. no. 27. New York, NY, USA: United Nations, 1991, p. xxvi, 363 p.: 71 fig., 62 tab.
G. J. Heij et Meinardi, C. R.,
A groundwater primer, (2nd) enlarged ed., vol. no. 21. Delft, The Netherlands: IRC, 1991, p. vii, 153 p. : fig., tab.
UN Economic Commission for Asia and the Pacific -Bangkok,TH, ESCAP,
Groundwater quality and monitoring in Asia and the Pacific, vol. no. 70. New York, NY, USA: United Nations, 1991, p. viii, 230 p.: 41 fig., 13 map, 43 tab.
T. W. Riunge,
« A guide to the development of information centres ». African Medical and Research Foundation (AMREF), Nairobi, Kenya, p. 25 p., 1991.
A. A. El Gaddal,
« Hafirs in Sudan », in
Rainwater catchment for future generations : proceedings of the 5th International Conference on Rain Water Cistern Systems, Keelung, Taiwan, 4-10 August 1991, 1991, p. P. 651-660 : 3 fig., photogr.
J. Naugle,
« Hand augered garden wells ». Lutheran World Relief, Niamey, Niger, p. 29 p.: 10 fig., 18 tech. drwngs, 1991.
G. Garvey, Gebrehiwet, K., et Yegletu, A.,
« Hand dug wells : field experience from Ethiopia », in
Infrastructure, environment, water and people : proceedings of the 17th WEDC Conference, United Nations Centre for Human Settlement (Habitat), Nairobi, Kenya, 19-23 August 1991, 1991, p. P. 181-184: 2 fig.
F. R. U. N. E. P. Indus Paris, ISWA -Copenhagen, DK, International Solid Wastes Association, et Nairobi, K. E. U. N. E. P. -,
« Hazardous waste policies and strategies : a training manual », vol. no. 10. United Nations, New York, NY, USA, p. ca. 270 p.: tab., 1991.
R. F. Carroll,
« Health aspects of latrine construction », vol. 196. Building Research Establishment, Watford, UK, p. 7 p.: fig., 1991.