R. Salazar, M. S., L., and Caparo, C.,
“no. 55 / 56. Desinfeccion del agua”,
Repindex. CEPIS (Centro Panamericano de Ingenieria Sanitaria y Ciencias del Ambiente), Lima, Peru, pp. p. i-xiv, 1-241 : fig., tab., 1995.
R. Kfir, Coubrough, P., and Bateman, B.,
“Provision of potable water utilizing a water treatment tablet”,
Water supply : the review journal of the International Water Supply Association, pp. p. 49-55: 3 fig., 1 tab., 1995.