Columbia subject headings:
Austrian drama--20th century--History and criticism--Congresses.
Austrian literature--20th century--History and criticism--Congresses.
Drama--Congresses.
Theater--Congresses.
Harvard subject headings:
Austrian drama--20th century--History and criticism--Congresses.
Austrian literature--20th century--History and criticism--Congresses
Drama--Congresses.
Theater--Congresses
Princeton subject headings:
Austrian drama--20th century--History and criticism--Congresses.
Austrian literature--20th century--History and criticism--Congresses.
Drama--Congresses.
Drama.
Theater--Congresses.