Columbia subject headings:
Democracy--European Union countries.
European Union countries--Politics and government--20th century.
European federation.
Harvard subject headings:
Constitutional history--Europe
Democracy--Europe.
Democracy--European Union countries
European Union
European Union countries--Politics and government--20th century.
European federation
Federal government--Europe
Representative government and representation--Europe
Princeton subject headings:
Democracy--European Union countries.
European Union countries--Politics and government--20th century.
European federation.