Columbia subject headings:
Belgium--Colonies--Africa--Administration.
Congo (Democratic Republic)--Politics and government--1908-1960.
Congo (Democratic Republic)--Politics and government.
Labor movement--Congo (Democratic Republic)
Socialism--Congo (Democratic Republic)
Working class--Congo (Democratic Republic)
Harvard subject headings:
Belgium--Colonies--Africa--Administration.
Congo (Democratic Republic)--Politics and government--1908-1960
Labor movement--Congo (Democratic Republic)
Socialism--Congo (Democratic Republic)
Working class--Congo (Democratic Republic)
Princeton subject headings:
Belgium--Colonies--Africa--Administration.
Congo (Democratic Republic)--Politics and government--1908-1960.
Labor movement--Congo (Democratic Republic).
Socialism--Congo (Democratic Republic).
Working class--Congo (Democratic Republic).