Dunyodagi ikkinchi eng yirik mineral sanoat Afrikaning mineral sanoatidir.

Manbalar

Umumiy manbalar

  • Thomas R. Yager; Omayra Bermúdez-Lugo; Philip M. Mobbs; Harold R. Newman; Mowafa Taib „The Mineral Industries of Africa“, . 2012 Minerals Yearbook. U.S. Geological Survey, PD license (U.S. government source, public domain), August 2012. 

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