Biblio

C. A. A. Butijn, Hoadley, A. W., Umolu, J., and Stoveland, S., “Nigeria : Rusafiya (rural water supply and sanitation) : report of evaluation mission”. UNDP (United Nations Development Programme), New York, NY, USA, p. 80 p. + annexes (ca. 80 p.): fig., tab., 1991.

R. Franceys, “Paying for water : urban water tariffs”, Waterlines, an international journal of water, sanitation and waste, pp. p. 9-12: photogr., 1990.

R. Franceys and Usman, B., “Paying for water”, in Water, engineering and development in Africa : proceedings of the 15th WEDC Conference, Kano, Nigeria, 3-7 April 1989, 1989, pp. p. 132-135: fig.