O. Guene, Tandia, C., and Toure, C. S.,
“Qualite des eaux des citernes de captage d'eau de pluie au Sahel”, in
Rainwater catchment for future generations : proceedings of the 5th International Conference on Rain Water Cistern Systems, Keelung, Taiwan, 4-10 August 1991, 1991, pp. P. 69-79 : 7 fig., 4 tab.
