Z. W. Blair Rese Harare,
«The Blair latrine builders manual». Blair Research Laboratory, Harare, Zimbabwe, p. 24 p.: fig., 1989.
A. D. Patwardhan,
«Chlorination and chlorinators», vol. no. M3. Indian Water Works Association, Bombay, India, p. viii, 67 p.: fig., tab., 1989.
H. N. U. N. I. C. E. F. - Tegucigalpa y Tegucigalpa, H. N. S. A. N. A. A. -,
«Estrategia de trabajo de promocion comunitaria». Honduras, Servicio Autonomo Nacional de Acueductos y Alcantarillados, Tegucigalpa, Honduras, p. 7 p. + annexes (ca. 30 p.), 1989.
Compania Nacional de Subsistencias Populares - Mexico City, MX, CONASUPO, MX, M. Secretaria, y City, M. X. U. N. I. C. E. F. - Me,
«Guia para la capacitacion en el manejo de las diarreas». Mexico, Secretaria de Salud, Mexico City, Mexico, p. 27 p. : ill., 1989.
A. Wyatt,
«Guidelines for maintenance management in water and sanitation utilities in developing countries», vol. no. 63. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. viii, 207 p.: fig., 1989.
M. E. Bentley y Brown, K. H.,
«Improved nutritional therapy of diarrhea : a guide for planners and decision makers involved in CDD programs». Technologies for Primary Health Care (PRITECH) Project, Arlington, VA, USA, p. viii, 44 p.: fig., photogr., tab., 1989.
T. F. Shaxson, Hudson, N. W., Sanders, D. W., Roose, E., y Moldenhauer, W. C.,
Land husbandry : a framework for soil and water conservation. Ames, IA, USA: Soil and Water Conservation Society, 1989, p. 64 p.: 20 fig., 37 photogr., 2 tab.