J. Zapp, Santacruz, J., Moncayo, J. I., Montes, M. L., and Hernandez, N.,
“Solar water purification in Colombia”, in
Solar water disinfection : proceedings of a workshop held at the Brace Research Institute, Montreal, Que., Canada, 15-17 August 1988, 1990, pp. P. 66-74: tab.