United Nations. Economic and Social Council; United Nations. Economic Commission for Africa; UN. ECA Executive committee Meeting (9th : 1973, June 18-22 : Addis Ababa, Ethiopia)(1973-06)
United Nations. Economic Commission for Africa.; United Nations. Economic and Social Council; UN. ECA zimbabew national chamber of commerce seminar on zimbabew - soviet trade (1988, May 10 - 12: Harare, Zimbabwe)(1988-04)