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MEETING OF EXPERTS ON HYDROLOGICAL PROBLEMS IN AFRICA; ADDIS ABABA; 1976.sd; S.L.; DA. S.D.; PP. 1-17Conference Paper
ECONOMIC COMMISSION FOR AFRICA REGIONAL REPORT1978; WATER DEVELOPMENT AND MANAGEMENT. PROCEEDINGS OF THE UNITED NATIONS WATER CONFERENCE/1977/MAR DEL PLATA; GBR; OXFORD: PERGAMON; DA. 1978; NO 2; PP. 519-637; 8 ILL.Conference Paper
