Biblio

E. H. Nicoll, Small water pollution control works : design and practice. Chichester, UK: Ellis Horwood, 1988, p. 502 p.: fig., tab.

G. B. Internatio London and Lisbon, P. T. National L., “International conference on waste stabilization ponds, Lisbon, Portugal, 1987 : preprints”. National Laboratory of Civil Engineering, Lisboa, Portugal, p. 348 p.: fig., tab., 1987.

K. V. Ellis, “Slow sand filtration as a technique for the tertiary treatment of municipal sewages”, Water research, pp. p. 403-410: tab., 1987.

G. DeWolf, Murin, P., Jarvis, J., and Kelly, M., “The cost digest : cost summaries of selected environmental control technologies”. US Environmental Protection Agency (EPA), Washington, DC, USA, p. xii, 92 p.: fig., tab., 1984.

L. B. Escritt and Haworth, W. D., Sewerage and sewage treatment : international practice. Chichester, UK: Wiley, 1984, p. xiii, 539 p.: fig., tab.

N. Zealand. M. NZ, “Intermittent biological sand filters for wastewater treatment”, vol. CDP 906/A. New Zealand, Ministry of Works and Development, Wellington, New Zealand, p. 11 p. : 4 fig., 1982.

D. D. Mara, Sewage treatment in hot climates. London, UK: Wiley, 1976, p. xii, 168 p.: fig., tab.