Columbia subject headings:
Europe--Economic integration.
Europe--Politics and government--1989-
European Union countries--Politics and government.
European Union.
European federation.
Harvard subject headings:
Europe--Economic integration.
Europe--Politics and government--1989-
European Union
European Union countries--Politics and government.
European federation.
Princeton subject headings:
Europe--Economic integration.
Europe--Politics and government--1989-
European Union countries--Politics and government.
European Union.
European federation.