Columbia subject headings:
Harvard subject headings:
European Union
European Union--Membership--Social aspects--History.
European Union--Turkey.
Group identity--European Union countries--History.
Group identity--Political aspects--European Union countries--History.
Princeton subject headings:
European Union--Membership--Social aspects--History.
European Union--Turkey.
European Union.
Group identity--European Union countries--History.
Group identity--Political aspects--European Union countries--History.