Columbia subject headings:
Europe--Defenses--Public opinion.
North Atlantic Treaty Organization--Public opinion.
Public opinion--Europe.
Public opinion--United States.
United States--Defenses--Public opinion.
Harvard subject headings:
Europe--Defenses--Public opinion.
North Atlantic Treaty Organization--Public opinion.
Public opinion--Europe
Public opinion--United States
United States--Defenses--Public opinion.
Princeton subject headings: