National Underground Railroad Freedom Center, www.freedomcenter.org/
Library of Congress: African-American Odyssey, lcweb2.loc.gov/ammem/aaohtml/
Boston Combusts: The Fugitive Slave Case of Anthony Burns, www.historynet.com/boston-combusts-the-fugitive-slave-case-of-anthony-burns.htm
National Memorial for Peace and Justice, museumandmemorial.eji.org/