Columbia subject headings:
National security--United States.
North Atlantic Treaty Organization.
United States--Foreign relations--1945-1989.
Harvard subject headings:
National security--United States
North Atlantic Treaty Organization
United States--Foreign relations--1945-
United States--Foreign relations--1945-1989.
Princeton subject headings:
National security--United States.
North Atlantic Treaty Organization.
United States--Foreign relations--1945-1989.