Columbia subject headings:
Harvard subject headings:
Austria--Politics and government--1945---Congresses.
Austria--Social life and customs--20th century--Congresses.
Nineteen sixty-eight, A.D.--Political aspects--Austria--Congresses.
Nineteen sixty-eight, A.D.--Social aspects--Austria--Congresses.
Princeton subject headings:
Austria--Civilization--20th century--Congresses.
Austria--Politics and government--20th century--Congresses.
Nineteen sixty-eight, A.D.--Congresses.