Biblio

A. Rachwal, Bauer, M., Buchanan, B., Colbourne, J., Foster, D., Goodman, N., Kay, A., and Sanders, T., “The GAC/slow sand filter sandwich : from concept to commissioning”, Water supply : the review journal of the International Water Supply Association, pp. p. 137-142: 9 fig., 1995.

P. H. Asian Deve Manila, “Managing water resources to meet megacity needs : proceedings of the regional consultation, Manila, 24-27 August 1993”. Asian Development Bank, Manila, Philippines, p. xiii, 425 p.: boxes, fig., maps, tab., 1994.

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.

W. E. Taylor, “Forty-fifth report on the result of the bacteriological, chemical and biological examination of the London waters for the years 1971-1973”, vol. no. 45. Metropolitan Water Board, London, UK, p. 188 p., 1974.