Columbia subject headings:
Harvard subject headings:
Biographies.
Congo (Democratic Republic)--Politics and government
Congo (Democratic Republic)--Politics and government--1885-1908
Congo (Democratic Republic)--Race relations--History--19th century.
Congo (Democratic Republic)--Race relations--History--20th century.
Forced labor--Congo (Democratic Republic)--History--19th century.
Forced labor--Congo (Democratic Republic)--History--20th century.
Human rights movements--History--19th century.
Human rights movements--History--20th century.
Indigenous peoples--Congo (Democratic Republic)--History--19th century.
Indigenous peoples--Congo (Democratic Republic)--History--20th century.
Léopold II, King of the Belgians, 1835-1909.
Princeton subject headings:
Congo (Democratic Republic)--Politics and government--1885-1908.
Congo (Democratic Republic)--Race relations--History--19th century.
Congo (Democratic Republic)--Race relations--History--20th century.
Forced labor--Congo (Democratic Republic)--History--19th century.
Forced labor--Congo (Democratic Republic)--History--20th century.
Human rights movements--History--19th century.
Human rights movements--History--20th century.
Indigenous peoples--Congo (Democratic Republic)--History--19th century.
Indigenous peoples--Congo (Democratic Republic)--History--20th century.