Columbia subject headings:
African Americans--History--1863-1877.
African Americans--History--1877-1964.
Racism--United States--History.
United States--Race relations.
Violence--United States--History.
Harvard subject headings:
African Americans--History--1863-1877
African Americans--History--1877-1964
Racism--United States--History
United States--Race relations
Violence--United States--History
Princeton subject headings:
African Americans--History--1863-1877.
African Americans--History--1877-1964.
Racism--United States--History.
United States--Race relations.
Violence--United States--History.