Columbia subject headings:
African Americans--History--To 1863--Sources.
Slavery--United States--History--19th century--Sources.
Slaves' writings, American--History and criticism.
Slaves--United States--Biography--History and criticism.
United States--Race relations--Sources.
Harvard subject headings:
African Americans--History--To 1863--Sources.
Slavery--United States--History--19th century--Sources.
Slaves--United States--Biography--History and criticism
United States--Race relations--Sources.
Princeton subject headings:
African Americans--Biography--History and criticism.
Slaves--United States--Biography--History and criticism.
Slaves--United States--Social conditions.