Columbia subject headings:
Harvard subject headings:
Capitalism--Congo (Democratic Republic)--History--19th century.
Capitalism--Congo (Democratic Republic)--History--20th century.
Congo (Democratic Republic)--Colonization.
Forced labor--Congo (Democratic Republic)--History--19th century.
Forced labor--Congo (Democratic Republic)--History--20th century.
Princeton subject headings:
Capitalism--Congo (Democratic Republic)--History--19th century.
Capitalism--Congo (Democratic Republic)--History--20th century.
Congo (Democratic Republic)--Colonization.
Forced labor--Congo (Democratic Republic)--History--19th century.
Forced labor--Congo (Democratic Republic)--History--20th century.