1990
I. L. Nyumbu, Scott, M., Seager, M., et 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.
S. Chandra, Bell, M., Klugman, J., et Brown, B.,
AIDAB and water development : sector review, vol. no. 8. Canberra, ACT, Australia: Australian Government Publishing Service, 1990, p. vi, 36 p.: box, fig., photogr., tab.
G. P. Kruseman et de Ridder, N. A.,
Analysis and evaluation of pumping test data, 2nd rev. ed.ᵉ éd., vol. no. 47. Wageningen, The Netherlands: International Institute for Land Reclamation and Improvement, 1990, p. 377 p.: fig., tab.
A. Younis, Sabea, H., et S. Katsha, E.,
« The Anne White health education summer clubs established at six primary schools in Menoufia Governorate : final report ». American University in Cairo, Social Research Centre, Cairo, Egypt, p. 19 p., 1990.
Rand Urban Government,
« Annual report 1988/89 for the rural water supply and sanitation sector ». Zimbabwe, Ministry of Local Government, Rural and Urban Development, Harare, Zimbabwe, p. 43 p.: tab., 1990.
F. W. Odera, Karanja, J. N., et Ombai, M.,
« The approach for sustainable rural water supply in Nyanza province, Kenya », presented at the 1990-01-01, Kisumu, Kenya, 1990, p. 76 p. : fig., map, tab.
I. L. Nyumbu, Scott, M., Seager, M., et 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.
E. P. de Jong,
Arbeidsovereenkomst. Deventer, The Netherlands: Kluwer, 1990, p. 3 vol. (various paging): loose-leaf.
M. Birley,
« Assessing the environmental health impact : an expert system approach »,
Waterlines, an international journal of water, sanitation and waste, p. p. 12-16: fig., photogr., 1990.
R. Semkow et Bessalel, M. M.,
« Assessment of solid waste management in Port-au-Prince, Haiti », vol. no. 292. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. xi, 75 p.: fig., photogr., tab., 1990.