Text ( visual ) : unmediated 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. -- [New York] : United Nations , [1987]. -- iv, 72 p. ; 28 cm. -- At head of title: Economic commission for Africa ; "United Nations publication Sales no. E.87.II.K.3"--Back cover title. -- (BB08869405) ; https://ci.nii.ac.jp/ncid/BB08869405 Author Heading(s): United Nations. Economic Commission for Africa

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