en.wikipedia.org
en.wikipedia.org
britannica.com
en.wikipedia.org
britannica.com
archive.org
britannica.com
newworldencyclopedia.org
New World Encyclopedia
https://www.newworldencyclopedia.org › entry › Central_Africa
en.wikipedia.org
aero-comlab.stanford.edu
Aerospace Computing Lab
aero-comlab.stanford.edu › jameson › world_history › A_Short_History_of_Africa.pdf
scribd.com
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