M. Abu-Zeid,
«Environmental upgrading of irrigation systems to control schistosomiasis»,
Waterlines, an international journal of water, sanitation and waste, pp. p. 31-35: photogr., 1990.
C. Bartone, Bernstein, J. D., y Wright, F.,
«Investments in solid waste management : opportunities for environmental improvement», vol. WPS405. World Bank, Policy, Research and External Affairs Complex, Washington, DC, USA, p. v, 85 p.: 6 fig., 5 tab., 1990.
J. K. Jordan y Ashmawi, M.,
«O&M vital to rural water supply systems in Egypt»,
Water and wastewater international, pp. p. 19-25 : photogr., 1990.
S. Arafa y Cotis, M. C.,
«Solar disinfection of water in rural communities», in
Solar water disinfection : proceedings of a workshop held at the Brace Research Institute, Montreal, Que., Canada, 15-17 August 1988, 1990, pp. P. 90-103: fig., tab.
H. Mitwally,
«A study on the local manufacture of plastic latrine pans in Egypt». World Health Organization Eastern Mediterranean Regional Office, Alexandria, Egypt, p. 48 p.: 15 fig., 2 tab., 1990.
B. Kay,
«Vector-borne disease implications and their control»,
Waterlines, an international journal of water, sanitation and waste, pp. p. 3-6: photogr., 1990.
J. C. Hooghart,
«Water management and remote sensing : Technical Meeting 47, Wageningen, The Netherlands, 7 November 1989», vol. no. 42. TNO Committee on Hydrological Research, The Hague, The Netherlands, p. 146 p.: fig., tab., photogr., 1990.