Columbia subject headings:
Harvard subject headings:
Burgtheater (Vienna, Austria)--History--20th century.
Burgtheater (Vienna, Austria)--History--21st century.
Theater--Austria--Vienna--History--20th century.
Theater--Austria--Vienna--History--21st century.
Princeton subject headings:
Burgtheater (Vienna, Austria)--History--Chronology.
Theater--Austria--Vienna--History--Chronology.