Columbia subject headings:
Belgium--Colonies--Africa--History--20th century.
Congo (Democratic Republic)--Economic conditions.
Congo (Democratic Republic)--History--1908-1960.
Harvard subject headings:
Belgium--Colonies--Economic policy--History.
Congo (Democratic Republic)--Economic policy--History.
Princeton subject headings:
Belgium--Colonies--Economic policy--History.
Congo (Democratic Republic)--Economic policy--History.