Biblio

J. T. Visscher, J. M., L., G. C., G., y Ochoa, A. E., «Comparison of horizontal and upflow roughing filtration», in Advances in slow sand and alternative biological filtration, 1996, pp. P. 341-348 : 2 fig., 6 tab.

B. J. Lloyd, Visscher, J. T., y G. C., G., «Overcoming water quality limitations with the multi-barrier concept : a case study from Colombia», in Slow sand filtration : an international compilation of recent scientific and operational developments, 1994, pp. P. 47-60: fig., 3 tab.

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.

J. T. Visscher y G. C., G., «Filtracion lenta en arena y pretratamiento : tecnologia para potabilizacion de agua», in Seminario internacional sobre technologia simplificada para potabilizacion del agua : agosto 17 al 21 de 1987 : memorias, The Hague, The Netherlands, 1987, p. 55 p.: fig., tab.