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The brain drain of professional, technical and kindred workers from developing countries : some lessons from the Africa-US flow of professionals (1980 - 1989)
Logan, Bernard Ikubolajeh, (1992)
Ten reasons why Sub-Saharan Africa has failed to develop economically : can Africans succeed by themselves?
Didia, Dal O., (2015)
Africa in the 21st century
Aseka, Eric Masinde, (1996)