Columbia subject headings:
African Americans--History--To 1863.
Racism--United States--History--19th century.
Riots--United States--History--19th century.
United States--History--1815-1861.
United States--Race relations.
Harvard subject headings:
African Americans--History--To 1863
Racism--United States--History--19th century
Riots--United States--History--19th century.
United States--History--1815-1861.
United States--Race relations
Princeton subject headings: