Text ( visual ) : unmediated Survey of economic and social conditions in Africa, 1986-1987 / Economic commission for Africa: twenty-third session of the commission and fourteenth meeting of the conference of ministers: Niamey, Niger 14-18 April 1988. -- New York : United Nations , 1988. -- viii, 84, A77 p. : ill. ; 28 cm. -- E/ECA/CM.14/4/Rev.1 ; Sales No. E.88.II.K.12. -- ISBN 9211250536 ; (BA13588496) ; https://ci.nii.ac.jp/ncid/BA13588496 Author Heading(s): United Nations. Economic Commission for Africa

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