Biblio

S. G. Hosking and M. Preez, D., “Valuing water gains in the Eastern Cape's Working for Water Programme”, Water SA, pp. p. 23-28 : 1 fig., 1 tab., 2002.

M. L. C. R. E. P. A. - Bamako, “Etude CAP santé, nutrition, eau, hygiène et assainissement dans 17 cercles du Mali”. Centre Regional pour l'Eau Potable et l'Assainissement a Faible Cout (CREPA), Bamako, Mali, p. 89 p.: fig., tabs., 2001.

B. Bauerle, “Emergency drinking water collection from plants”, AT source, pp. p. 8-10: fig., photogr., 1991.

N. G. N. E. S. T. - Ibadan, Nigeria's threatened environment : a national profile. Ibadan, Nigeria: Nigerian Environmental Study / Action Team, 1991, p. vi, 288 p.: fig., photogr., tab.

A. L. de Jager, “Models for the prediction of soil erosion and silt sedimentation in artificial lakes in Northern Ghana in order to determine life time”. SAWA, Utrecht, The Netherlands, p. 36 p.: fig., tab., 1989.

EPA -Cincinnati, OH, US and EPA -Washington, DC, US, “Process design manual for land treatment of municipal wastewater : supplement on rapid infiltration and overland flow”. US Environmental Protection Agency (EPA), Center for Environmental Research Information, Cincinnati, OH, USA, p. x, 121 p.: fig., tab., 1984.

F. R. France. Mi Paris, “Evaluation des quantites d'eau necessaires aux irrigations”. France, Ministere de la Cooperation, Paris, France, p. 204 p.: fig., tab., 1979.