Columbia subject headings:
Austrian drama--20th century--History and criticism--Congresses.
Austrian drama--21st century--History and criticism--Congresses.
Harvard subject headings:
Austrian drama--20th century--History and criticism--Congresses.
Austrian drama--21st century--History and criticism--Congresses.
Austrian drama--History and criticism--Congresses.
Theater--Austria--Congresses.
Princeton subject headings:
Austrian drama--20th century--History and criticism--Congresses.
Austrian drama--21st century--History and criticism--Congresses.