Columbia subject headings:
European Union countries--Politics and government.
European Union--History.
Political planning--European Union countries.
Harvard subject headings:
European Union
European Union countries--Economic policy.
European Union countries--Politics and government.
European Union countries--Social policy.
European Union--History.
European federation
Political planning--European Union countries.
Princeton subject headings:
European Union countries--Politics and government.
European Union--History.
Political planning--European Union countries.