Media type: E-Article Title: Beating against the Barriers: Biographical Essays in Nineteenth-Century Afro-American History Contributor: Silverman, Jason H.; Blackett, R. J. M. Published: Oxford University Press (OUP), 1987 Published in: The Journal of American History, 74 (1987) 2, Seite 511 Language: Without Specification DOI: 10.2307/1900069 ISSN: 0021-8723 Keywords: History and Philosophy of Science ; History Origination: Footnote: