Columbia subject headings:
Europe--History--20th century.
European Union countries--Politics and government.
European Union.
Harvard subject headings:
Europe--History--20th century.
European Union
European Union countries--Politics and government.
European Union--France.
France--Foreign relations--20th century.
France--Politics and government--20th century,
Princeton subject headings:
Europe--History--20th century.
European Union countries--Politics and government.
European Union.