Biblio

L. J. M., Wegelin, M., and G. C., G., “La filtracion gruesa en el tratamiento de agua de fuentes superficiales”, vol. no. 4/98. SKAT (Swiss Centre for Development Cooperation in Technology and Management), St. Gallen, Switzerland, p. vi, 170 p. : fig., photogr., tab., 1998.

J. T. Visscher, J. M., L., G. C., G., and 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.

J. T. Visscher, J. M., L., and G. C., G., “Performance evaluation of dynamic roughing filtration”, in Advances in slow sand and alternative biological filtration, 1996, pp. P. 349-358 : 5 fig., 3 tab.

B. J. Lloyd, Visscher, J. T., and 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.

J. T. Visscher, G. C., G., and Fernandez, J., “Comparative study of different pre-treatment alternatives”, Aqua : journal of water supply research and technology, pp. p. 337-346: 7 fig., 5 tab., 1993.

J. T. Visscher, Beron, F., G. C., G., and Fernandez, J., “Pre-treatment alternatives for drinking water supply systems : selection, design, operation and maintenance”, vol. no. 22. IRC, The Hague, The Netherlands, p. viii, 101 p.: 40 fig., 19 tab., 1993.

B. J. Lloyd, Visscher, J. T., and 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.

M. Pardon, Wegelin, M., and G. C., G., “Prefilters, handpumps and small tanks : key issues for viable rural water supplies?”, Water supply : the review journal of the International Water Supply Association, pp. p. SS18.1-SS18.8: fig., tab., 1989.

J. T. Visscher, E. R., Q., J. M., L., A. C., G., R. Munoz, D., V., C. H. Cruz, and G. C., G., “Proyecto integrado de investigacion y demostracion en filtracion lenta en arena : informe final, version resumida”. Centro Inter-Regional de Abastecimiento y Remocion de Agua, Cali, Colombia, p. 48 p.: fig., tab., 1989.