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2000
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Onwurah, Ngozi. : Contemporary Black biography. Volume 38 : profiles from the international Black community / Ashyia N. Henderson,editor.| [Gale electronic resource]
2003
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2005
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Onyewu, Oguchi. : Contemporary Black biography. Volume 60 : profiles from the international Black community / Sara and Tom Pendergast, editors.| [Gale electronic resource]