F. Ministere FR,
«Alimentation en eau». France, Ministere de la Cooperation, Paris, France, p. 82 p. : fig., tab., 1977.
D. Stanley,
«The Arusha windmill : a construction manual». Volunteers in Technical Assistance, Arlington, VA, USA, p. 58 p. : fig. photogr., tab., 1977.
P. Ministerio PE,
«Manual de promocion de comunidades». Peru, Ministerio de Salud, Departamento de Promocion de Comunidades, Lima, Peru, p. 38 p., 1977.
P. H. Local Wate City,
«Operations & maintenance manual for local water districts». Local Water Utilities Administration, Quezon City, The Philippines, p. ca. 340 p.: fig., tab., 1977.
EPA -Cincinnati, OH, US y EPA -Washington, DC, US,
Process design manual : wastewater treatment facilities for sewered small communities. Cincinnati, OH, USA: US Environmental Protection Agency (EPA), 1977, p. xv, 477 p.: fig., tab.
N. Department NP, Pokhara, N. P. S. A. T. A. -, y Kathmandu, N. P. U. N. I. C. E. F. -,
«Rural water supply Nepal : hydrology-water cycle course», vol. no. 1. Nepal, Department of Local Development, Kathmandu, Nepal, p. 18 p. : techn.drwngs, 1977.