Columbia subject headings:
Harvard subject headings:
Constitutiuonal law--European Union countries.
European Union
European Union countries--Politics and government--21st century.
European federation.
Law--European Union countries
Public law--European Union countries.
Treaty on European Union Protocols, etc.
Princeton subject headings:
Constitutiuonal law--European Union countries.
European Union.
Public law--European Union countries.
Treaty on European Union Protocols, etc.