David Zimmerman, "William Whipper in the Black Abolitionist Tradition"
http://web.archive.org/web/20110720065946/http://www.millersville.edu/...
Referenced in:
William Whipper
David Zimmerman, "William Whipper in the Black Abolitionist Tradition"
http://web.archive.org/web/20110720065946/http://www.millersville.edu/...
Referenced in:
William Whipper