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Bureau of Mines / Minerals yearbook mineral industries of Africa 1990
(1990)
van Oss, Hendrik G.; Izon, David
Senegal, the Gambia, and Guinea-Bissau, pp. 186-[193]
Page 186
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As a work of the United States government, this material is in the public domain.| For information on re-use see: http://digital.library.wisc.edu/1711.dl/Copyright




