Columbia subject headings:
Europe--Foreign public opinion, American.
Europe--Foreign relations--United States.
Security, International.
United States--Foreign public opinion, European.
United States--Foreign relations--Europe.
Harvard subject headings:
Europe--Foreign public opinion, American.
Europe--Foreign relations--United States.
Security, International.
United States--Foreign public opinion, European.
United States--Foreign relations--Europe.
Princeton subject headings:
Europe--Foreign public opinion, American.
Europe--Foreign relations--United States.
Security, International.
United States--Foreign public opinion, European.
United States--Foreign relations--Europe.