Columbia subject headings:
Harvard subject headings:
Austria--History--1955---Congresses.
Austria--History--Allied occupation, 1945-1955--Congresses.
History, Modern--Study and teaching--Congresses.
Switzerland--History--20th century--Congresses.
Princeton subject headings:
Austria--History--1955---Congresses.
Austria--History--Allied occupation, 1945-1955--Congresses.
History, Modern--Study and teaching--Congresses.
Switzerland--History--20th century--Congresses.