Columbia subject headings:
Germany--Foreign public opinion, French--Congresses.
Germany--Foreign public opinion, Polish--Congresses.
Germany--History--Study and teaching--Congresses.
Public opinion--France--History--19th century--Congresses.
Public opinion--France--History--20th century--Congresses.
Public opinion--Poland--History--19th century--Congresses.
Public opinion--Poland--History--20th century--Congresses.
Harvard subject headings:
German reunification question (1949-1990)--Congresses
Germany--Foreign public opinion, European.
Germany--Study and teaching--Europe.
Princeton subject headings:
Germany--Foreign public opinion, French--Congresses.
Germany--Foreign public opinion, Polish--Congresses.
Germany--History--Study and teaching--Congresses.
Public opinion--France--History--19th century--Congresses.
Public opinion--France--History--20th century--Congresses.
Public opinion--Poland--History--19th century--Congresses.
Public opinion--Poland--History--20th century--Congresses.