Columbia subject headings:
Harvard subject headings:
Civilization, Western--Congresses
Europe--Foreign public opinion, North American--Congresses.
Europe--Foreign public opinion, South American--Congresses.
Public opinion--Europe--History--Congresses.
Public opinion--South America--History--Congresses.
Public opinion--United States--History--Congresses.
Social perception--Congresses
South America--Foreign public opinion, European--Congresses.
United States--Foreign public opinion, European--Congresses.
Princeton subject headings:
Europe--Relations--United States--Congresses.
Imagination--Congresses.
United States--Ethnic relations--Congresses.
United States--Relations--Europe--Congresses.
Utopias--Congresses.