1991
M. X. Comision N. City, Jiutepec, M. X. Instituto, et IWRA -Urbana, IL, US,
« International Seminar on Efficient Water Use : proceedings ». Comision Nacional del Agua, Mexico City, Mexico, p. 938 p.: fig., tab., 1991.
S. A. Esrey,
« Interventions for the control of diarrhoeal diseases among young children : fly control ». World Health Organization, Diarrhoeal Diseases Control Programme, Geneva, Switzerland, p. 19 p.: 5 tab, 1991.
L. K. Helvetas - Moratuwa et Moratuwa, L. K. Sarvodaya,
« Introduction to surveying ». Helvetas, Swiss Association for Development and Cooperation, Nugegoda, Sri Lanka, p. 11 p. : tab., fig., photogr., 1991.
I. N. P. S. U. Founda Lucknow,
« The Jal Samiti in water and sanitation projects : an Uttar Pradesh experience », in
NAP India '91 : conference on Indo-Dutch bilateral cooperation in rural water supply and sanitation, February 25-26 1991, Lucknow, 1991, p. 7 p.
N. Chaudhuri, Gortworst, H., van Luijk, J., de Lijster, J., et Wegelin-Schuringa, M. H. A.,
« Jointly breaking a vicious circle : report of the formulation mission institution and community development ». Netherlands Embassy, India, New Delhi, India, p. 65 p.: tab., 1991.
K. E. Kefinco - Kakamega, Helsinki, F. I. F. I. N. N. I. D. A. -, et KE, K. Ministry o,
« Kenya-Finland Western Water Supply Programme : annual report 1991 ». Kefinco, Helsinki, Finland, p. 30 p. + annexes (ca. 35 p.) : tab., photogr., 1991.
A. Kruger et Lunoe, B.,
« Kigoma water programme : inspection report ». NORAD, Norwegian Agency for Development Cooperation, Oslo, Norway, p. v, 94, 66 p.: fig., tab., 1991.
B. van Hemert, Haemhouts, J., O. Galiz, A., et O. Orozco, S.,
« La bomba de mecate : el desafio de la tecnologia popular ». Nicaragua, Direccion de Acueductos Rurales, Juigalpa, Nicaragua, p. 213 p.: 52 fig., 26 tab., photogr., 1991.
A. Menendez et Silva, M.,
« La provision de agua potable a los barrios perifericos de San Bernardo : estudio de caso », vol. 830/010. World Bank, Economic Development Institute, Washington, DC, USA, p. 25 p. : ill , tab., 1991.