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Latorre M., J., Fernandez M., J., Sanchez T., A., Munoz S., N., Beron C., F., and Restrepo, M., “Uso de fibras naturales y sinteticas en filtracion lenta en Colombia : una experiencia en ambientes tropicales”. CINARA, Cali, Colombia, p. 40 p. : 10 fig., 9 photogr., 7 tab. ; CD-ROM: 650MB/74 min., 2001.

Oxfam -Oxford, GB, “Oxfam water supply scheme for emergencies : water filtration pack”. Oxfam, Oxford, UK, p. 26 p. : fig., tabs., 2000.

Manz, D., “CWF household filter”. Samaritan's Purse, International Relief, p. 58 p. : photogr., tabs., 1999.

Galvis C., G., “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.

Galvis C., G., Latorre M., J., 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.

Wotton, R.S. and Hirabayashi, K., “Midge larvae (diptera: chironomidae) as engineers in slow sand filter beds”, Water research, pp. p. 1509-1515 : 3 fig., 1999.

Mercado, A., “Disinfection systems of appropriate technology in Cochabamba, Bolivia”. Universidad Mayor de San Simon, Cochabamba, Bolivia, p. 11 p. : 6 fig., 2 tab., 1998.

Visscher, J.T., Latorre M., J., and Galvis 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.

Mwiinga, G., “The potential for the use of roughing - slow sand filtration systems in Zambia”. University of Zambia, Lusaka, Zambia, p. xiii, 140 p. : 54 fig., 28 tab., 1998.

Graham, M.J.D. and Luxton, P.J., “Preliminary evaluation of natural fabrics in slow sand filtration”, Aqua : journal of water supply research and technology, 1998.

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Lloyd, B.J., Woudneh, M.B., and Stevenson, D., “The behaviour of 2,4-D as it filters through slow sand filters”, Aqua : journal of water supply research and technology, pp. p. 144-149 : 6 fig., 3 tab., 1997.

Solsona, F. and Kariuki, A.W., Report to the Water Research Commission. Part 1 on a dynamic cross-flow sand filter for rural water treatment. Part 2 on a technical guide for a dynamic cross-flow sand filter, vol. no. 539/1/97. Pretoria, South Africa: Water Research Commission, WRC, 1997, p. vii, 77 p. : fig., photogr., tab.

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Graham, N. and Collins, R., “Advances in slow sand and alternative biological filtration”. Wiley, Chichester, UK, p. xvii, 461 p. : fig., tab., 1996.

Lloyd, B.J., Clarke, B.A., Crompton, J.L., and Major, I.P., “Cleaning of upflow gravel prefilters in multistage filtration water treatment plants”, in Advances in slow sand and alternative biological filtration, 1996, pp. P. 391-401 : 10 fig., 1 tab.

Visscher, J.T., Latorre M., J., Galvis 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.

Lloyd, B.J., Graham, M.J.D., Clarke, B.A., and Jones, C.J., “Effect of reduced depth, fabric-protected slow sand filters on treated water quality”, in Advances in slow sand and alternative biological filtration, 1996, pp. P. 233-243 : 7 fig., 6 tab.

Mesfin, S., “Experiences with slow sand filtration in Ethiopia”, in Advances in slow sand and alternative biological filtration, 1996, pp. P. 379-387 : 3 fig.

Li, G.B., Du, K.Y., and Ma, J., “Multi-stage slow sand filtration for the treatment of high turbid water”, in Advances in slow sand and alternative biological filtration, 1996, pp. P. 371-378 : 5 fig., 1 tab.

Visscher, J.T., Latorre M., J., and Galvis 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.

Wegelin, M., Zimmerman, T., and Burgthaler, B., “Rehabilitation of slow sand filters and new treatment plant designs in rural Cameroon”, in Advances in slow sand and alternative biological filtration, 1996, pp. P. 359-369 : 7 fig., 5 tab.