F. A. Munoz et Salazar, N.,
« Participacion comunitaria, educacion sanitaria e higiene personal : memorias del primer taller regional, realizado en Lima, Peru, 19-23 de marzo, 1990 ». CEPIS (Centro Panamericano de Ingenieria Sanitaria y Ciencias del Ambiente), Lima, Peru, p. 172 p., 1990.
D. Ey,
« Planning for water and sanitation programs in Bolivia, Ecuador, and Peru », vol. no. 302. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. xiii, 62 p.: fig., map, tab., 1990.
S. A. Loomis,
« Pre-implementation workshop for the water and sanitation for health and Ecuadorian development project, November 29-December 1, 1989 », vol. no. 288. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. viii, 70 p.: tab., 1990.
S. Fry, Brahmam, S., Joseph, E., et Burns, J.,
« Strategies for linking water and sanitation programs to child survival », vol. no. 65. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. 65 p., 1990.