Columbia subject headings:
Harvard subject headings:
Criminal justice, Administration of--European Union countries--Congresses.
European Union countries--Military policy--Congresses.
European Union--International cooperation--Congresses.
National security--European Union countries--Congresses.
Police administration--European Union countries--International cooperation--Congresses.
Police--European Union countries--International cooperation--Congresses.
Treaty on European Union Protocols, etc.
Princeton subject headings:
Police--European Union countries--Congresses.