1990
PAHO -Washington, DC, US,
« Efficient use and optimization of drinking water services », in
Regional conference on water supply and sanitation : evaluation of the International Drinking Water Supply and Sanitation Decade and projections towards the year 2000, Puerto Rico, 4-6 September de 1990, 1990, p. 11 p.
C. O. Suna- Hisca Bogota,
« El agua y la salud ». Chusos, Bogota, Colombia, p. 42 p.: drawing, 1990.
« Enterprise development and microfinance ». Practical Action Publishing, London, UK, 1990.
R. Goodland,
« Environmental aspects of dam and reservoir projects : the World Bank's new policy »,
Waterlines, an international journal of water, sanitation and waste, p. 7-10: photogr., 1990.
L. F. Requena et de la Parra, C.,
« Environmental assessment of the public services improvement project component III - water supply, sanitation and health : El Salvador », vol. no. 299. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. xii, 97 p.: photogr., 1990.
M. R. Khan et Gijzen, H. J.,
« Environmental pollution and its management in Eastern Africa : proceedings of a symposium organized by the Faculty of Science, University of Dar es Salaam, Dar es Salaam, September 11-14th, 1989 ». University of Dar es Salaam, Faculty of Science, Dar es Salaam, Tanzania, p. viii, 387 p.: fig., tab., map., 1990.
EPA -Cincinnati, OH, US,
« Environmental pollution control alternatives : drinking water treatment for small communities ». US Environmental Protection Agency (EPA), Cincinnati, OH, USA, p. vi, 82 p. : fig., photgr., tab., tech drwngs., 1990.
C. de Jong-Boon,
« Environmental problems in Sudan : a reader ». Institute of Social Studies, Research and Project Office, The Hague, The Netherlands, p. 2 vol. (xxi, 819 p.): fig., map, tab., 1990.
R. Beck,
« Environmental profile Al Bayda Governorate, Yemen Arab Republic ». DHV, Amersfoort, The Netherlands, p. 48 p.: fig., map, photogr., 1990.
R. Beck,
« Environmental profile Dhamar Governorate, Yemen Arab Republic ». DHV, Amersfoort, The Netherlands, p. 48 p. : fig., map, photogr., 1990.
R. Beck,
« Environmental profile Tihama, Yemen Arab Republic ». DHV, Amersfoort, The Netherlands, p. 48 p. : fig., map., photogr., 1990.
World Bank -Washington, DC, US et Luxembourg, L. U. European I.,
The environmental program for the Mediterranean : preserving a shared heritage and managing a common resource. Washington, DC, USA: World Bank, 1990, p. ix, 93 p.: box, map, tab.
J. Hukka,
Environmental sanitation : beyond the Decade : discussion paper, vol. no. 40. Tampere, Finland: Tampere University of Technology, 1990, p. 63 p.: tab.
M. Abu-Zeid,
« Environmental upgrading of irrigation systems to control schistosomiasis »,
Waterlines, an international journal of water, sanitation and waste, p. p. 31-35: photogr., 1990.