1981
T. S. Wood,
«Simple assessment techniques for soil and water». CODEL, Environment and Development Program, New York, NY, USA, p. iii, 31 p., 1981.
A. S. Kauzeni, Lomoy, J., Ronningen, K., Shirima, D., Kaunde, B. A., Kapele, A. S., Sayana, J. S., Ulaya, E., y Yonah, A. S.,
«Socio-economic aspects of water master plan of Rukwa Region». University of Dar es Salaam, Bureau of Resource Assesssment and Land Use Planning, Dar es Salaam, Tanzania, p. iv, 92 p. : fig., tab., 1981.
B. B. P. A. H. O. - Bridgetown,
«Training coordinator's handbook». Pan American Health Organization (PAHO), Bridgetown, Barbados, p. Microfiche (ca. 100 p.), 1981.
J. F. Mazariegos y De Zeissig, J. A. A.,
«Water purification using small artisan filters». Central American Research Institute for Industry (ICAITI), Guatemala, Guatemala, p. 81 p.: fig., tab., 1981.
1980
B. F. G. R. A. A. P. - Bobo-Dioulasso,
«Ameliorer la sante au village». Groupe de Recherche et d'Appui pour l'Autopromotion Paysanne, Bobo-Dioulasso, Burkina Faso, p. 85 p., 1980.
I. D. Yayasan Di Yogyakarta,
«Biogas». Yayasan Dian Desa, Jogjakarta, Indonesia, p. 14 p., 1980.
S. P. Mathur,
«Design and development of a simple electrical resistivity equipment for groundwater investigations in shallow depths». Thailand, Ministry of Public Health, Rural Water Supply Division, Bangkok, Thailand, p. ii, 17 p.: fig., tab., photogr., 1980.
J. Pickford,
«The design of septic tanks and aqua-privies», vol. no. 187. Building Research Establishment, Overseas Division, Watford, UK, p. 12 p., 1980.
D. Curtis, Carruthers, I., Feachem, R., Bradley, D., Baldwin, G., y Cairncross, S.,
Evaluation for village water supply planning, vol. no. 15. Chichester, UK: Wiley, 1980, p. xviii, 179 p.: fig., tab.
J. H. Austin, Flanagan, D. R., y Francis, Q.,
«A guide for training manual developers». Caribbean Basin Water Management Project, Bridgetown, Barbados, p. Microfiche (ca. 200 p.): tab., 1980.