Columbia subject headings:
Europe--Politics and government--1945---Congresses.
National security--Europe--Congresses.
North Atlantic Treaty Organization--History--Congresses.
Harvard subject headings:
Europe--Politics and government--1945---Congresses.
National security--Europe--Congresses
North Atlantic Treaty Organization--History--Congresses.
Princeton subject headings:
Europe--Politics and government--1945---Congresses.
National security--Europe--History--Congresses.
North Atlantic Treaty Organization--History--Congresses.