@book{ BB08869405, author = "United Nations. Economic Commission for Africa", title = "Survey of economic and social conditions in Africa, 1984-1985 : Twenty-first session of the Commission and twelfth meeting of the Conference of Ministers : Yaounde, Cameroon, 17-21 April 1986", publisher = "United Nations", year = "1987", URL = "https://ci.nii.ac.jp/ncid/BB08869405" }

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