S. A. Muyibi, Odumosu, O. B., and Omozokpia, P. A.,
“Ferrugenous groundwater treatment with Bida sands”, in
Water, engineering and development in Africa : proceedings of the 15th WEDC Conference, Kano, Nigeria, 3-7 April 1989, 1989, pp. P. 38-41: fig., tab.
S. K. Gadkari, Kaul, S. N., Badrinath, S. D., Deshpande, V. P., and Dixit, R. C.,
“Performance evaluation of continuous flow iron removal pilot plant”,
Asian environment, pp. p. 31-38: fig., tab., 1989.
K. Ofori-Tutu,
“Removal of iron from groundwaters”, in
Water, engineering and development in Africa : proceedings of the 15th WEDC Conference, Kano, Nigeria, 3-7 April 1989, 1989, pp. P. 47-51: fig., tab.
S. Vigneswaran, Bhattarai, K. K., and R. Tiwaree, S.,
“Small community water supply : an illustrative manual”. Asian Institute of Technology, Environmental Engineering Division, Bangkok, Thailand, p. vi, 56 p.: fig., 1989.
G. A. Bridger,
Water quality and treatment, vol. no. D3. Ratmalana, Sri Lanka: National Water Supply and Drainage Board, 1989, p. iv, 182 p.: fig., tab.