Biblio

A. Wood, Scheepers, J., and Hills, M., “Combined artificial wetland and high rate algal pond for wastewater treatment and protein production”, Water science and technology, pp. p. 659-668 : fig., tab., 1989.

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.

I. Zandstra and Redekopp, A., “Reclamation of nutrients, water and energy from waste : a review of selected IDRC-supported research”, vol. 124e. International Development Research Centre (IDRC), Ottawa, Ont, Canada, p. 151 p.: fig., tab., 1986.