Columbia subject headings:
Europe--Defenses--Congresses.
National security--Europe--Congresses.
Nuclear warfare--Congresses.
Warfare, Conventional--Congresses.
Harvard subject headings:
Europe--Defenses--Congresses.
National security--Europe--Congresses
Nuclear warfare--Congresses
Warfare, Conventional--Congresses.
Princeton subject headings:
Europe--Defenses--Congresses.
National security--Europe--Congresses.
Nuclear warfare--Congresses.
Warfare, Conventional--Congresses.