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3Rebecca Chalmers Berton. Witnesses for Freedom:Negro American in Autobiography[M].New York and London:Harper&Brothers Publishers,1948.
4James Coodwin. Autobiography:The Self Made Text[M].New York:Twayne Bublishers,1993.
5Fredric Douglass. Life and Times of Fredric Douglass[M].New York,Collier Books,1962.
