P. E. C. E. P. I. S. - Lima, AIDIS -New York, NY, US, PAHO -Washington, DC, US, UNICEF -New York, NY, US, and Caribbean Water and Wastewater Association -St.Joseph, TT, CWWA,
“Boys and girls in action : guidebook on water and environmental health for schools and communities of Latin America and the Caribbean”. CEPIS (Centro Panamericano de Ingenieria Sanitaria y Ciencias del Ambiente), Lima, Peru, p. 36 p. : ill., 1999.