H. Alberts, Meza, R., Solis, D., y Rodriguez, M.,
«How the rope pump won in Nicaragua»,
Waterlines, an international journal of water, sanitation and waste, pp. p. 3-5: 2 tab., photogr., 1993.
E. Salazar-Lindo, Alegre, M., Rodriguez, M., Carrion, P., y Razzeto, N.,
«The Peruvian cholera epidemic and the role of chlorination in its control and prevention», in
Safety of water disinfection : balancing chemical and microbial risks, 1993, pp. P. 401-413: 2 fig., 3 tab.