Columbia subject headings:
African Americans--Pennsylvania--Philadelphia.
African Americans--Social conditions.
Sociology--United States.
Harvard subject headings:
African Americans--Pennsylvania--Philadelphia--Social conditions--19th century.
African Americans--Pennsylvania--Philadelphia--Social life and customs--19th century.
Philadelphia (Pa.)--Race relations--History--19th century.
Philadelphia (Pa.)--Social conditions--19th century.
Princeton subject headings:
African Americans--Pennsylvania--Philadelphia--Social conditions--19th century.
African Americans--Pennsylvania--Philadelphia--Social life and customs--19th century.
Philadelphia (Pa.)--Race relations--History--19th century.
Philadelphia (Pa.)--Social conditions--19th century.