Book call no. Statesmen's Who's Who 2000 . East Grinstead, West Sussex, England, Bowker-Saur, 1999. London, Oxford University Press for the International Institute for Strategic Studies, 1999. 320 p. Ghana, p 263.
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International 1997 Africa and the Middle East Volume 3 . Washington, U.S. Dept of the Interior and U.S. Geological Survey, 1999. The Mineral Industry of Ghana by George J. Coakley, p Q1-Q2. Book call no. New York, Routledge, 1998.