Columbia subject headings:
National security--Europe.
National security--United States.
North Atlantic Treaty Organization.
World politics--1945-1989.
Harvard subject headings:
National security--Europe
National security--United States
North Atlantic Treaty Organization
World politics--1945-
World politics--1945-1989
Princeton subject headings:
National security--Europe.
National security--United States.
North Atlantic Treaty Organization.
World politics--1945-1989.