Columbia subject headings:
African Americans--Congresses.
African Americans--History--1863-1877--Sources.
African Americans--History--1877-1964--Sources.
African Americans--Politics and government--Sources.
Harvard subject headings:
African Americans--Congresses
African Americans--History--1863-1877--Sources.
African Americans--History--1877-1964--Sources.
African Americans--Politics and government--Sources.
Princeton subject headings:
African Americans--Congresses.
African Americans--History--1863-1877--Sources.
African Americans--History--1877-1964--Sources.
African Americans--Politics and government--Sources.