Columbia subject headings:
Security, International--Europe.
Harvard subject headings:
Europe--Politics and government--1989-
European Union--Congresses.
National security--Europe--Congresses
North Atlantic Treaty Organization--Congresses.
Organization for Security and Co-operation in Europe--Congresses.
Peace movements--Europe--Congresses.
Peace--Congresses
Peace-building--Europe--Congresses.
Security, International--Congresses
Princeton subject headings: