1990
J. van Winden,
«Rural mechanics course. 4 : Technical drawing». TOOL, Amsterdam, The Netherlands, p. 100 p.: tech. drwngs, 1990.
PROWWESS -New York, NY, US y Water and Sanitation Program -Washington, DC, US, WSP,
«Rural sanitation in Lesotho : from pilot project to national program», vol. no. 3. World Bank, Washington, DC, USA, p. ix, 26 p. : photogr., 1990.
M. Strauss,
«Rural sanitation in Zhejiang province, China : report of mission 2-8 April 1990». International Reference Centre for Waste Disposal, Duebendorf, Switzerland, p. ii, 21 p.: fig., photogr., 1990.
C. S. L. Chachage, Nawe, J., y Wilfred, L. L.,
«Rural water and sanitation programme in Morogoro and Shinyanga regions : a study on women involvement in the implementation of the programme». Dar es Salaam University Press, Dar es Salaam, Tanzania, p. x, 68 p.: tab., 1990.
P. Morgan,
Rural water supplies and sanitation. London, UK: Macmillan, 1990, p. 358 p.: ill.
UNDP -New York, NY, US,
«Safe water 2000». UNDP (United Nations Development Programme), New York, NY, USA, p. video (13 min.): VHS, 1990.
S. Cairncross,
«Sanitation and the control of hookworm disease», in
Hookworm disease : current status and new directions, 1990, pp. P. 304-317: 4 fig., 3 tab.
M. Yusuf y Hussain, A. M. Zakir,
«Sanitation in rural communities in Bangladesh»,
Bulletin of the World Health Organization, pp. p. 619-624: tab., 1990.
Socio-Economic Units, Kerala -Trivandrum, IN,
«Sanitation strategy». Kerala Water Authority, Socio-Economic Units, Trivandrum, India, p. 32 p.: fig., 1990.
UNDP -New York, NY, US y de l'Industrie, del'Hydrauli,
«Schema directeur de mise en valeur des ressources en eau du Mali». UNDP Department of Technical Cooperation for Development, New York, NY, USA, p. 2 vol. (281, 113 p.) : fig., tab., 1990.
Z. Ministry o ZW,
«Sector paper on water supply and sanitation in commercial farming areas», in
Decade consultative meeting on water supply and sanitation 1981-90 : Harare, 26-30 November 1990 : proceedings and resolutions, 1990, p. ca. 12 p.: tab.
Rand Urban Government,
«Sector paper on water supply and sanitation in communal lands», in
Decade consultative meeting on water supply and sanitation 1981-90 : Harare, 26-30 November 1990 : proceedings and resolutions, 1990, p. ca. 20 p.: fig., tab.
Rand Urban Government,
«Sector paper on water supply and sanitation in resettlement 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.
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.
Rand Urban Government,
«Sector paper on water supply and sanitation in Zimbabwe», in
Decade consultative meeting on water supply and sanitation 1981-90 : Harare, 26-30 November 1990 : proceedings and resolutions, 1990, p. 30 p.: fig. tab. maps.