Biblio

G. G. C., “Development and evaluation of multistage filtration plants : an innovative, robust and efficient water treatment technology”. Centre for Environmental Health Engineering (CEHE), Guildford, UK, p. CD-ROM : 146 MB, 1999.

G. G. C., J. M., L., and Visscher, J. T., Filtracion en multiples etapas : tecnologia innovativa para el tratamiento de agua, vol. no. 34-S. Cali, Colombia: CINARA, 1999, p. 197 p. : 68 fig., 60 tab.

J. T. Visscher, J. M., L., and G. C., G., Multi-stage filtration : an innovative water treatment technology, vol. no. 34-E. The Hague, The Netherlands: IRC, 1998, p. xiii, 165 p. : 68 fig., 60 tab.

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.