Biblio

B. J. Lloyd, Visscher, J. T., y G. C., G., «Multi-stage surface water treatment for community water supply in Colombia», Waterlines, an international journal of water, sanitation and waste, pp. p. 26-29 : 3 fig., 3 tab., photogr., 1992.

B. J. Lloyd, Pardon, M., y Bartram, J., «Improving piped water supplies in Peru», Waterlines, an international journal of water, sanitation and waste, pp. p. 24-26: tab., ill., 1989.