Columbia subject headings:
Brecht, Bertolt, 1898-1956--Criticism and interpretation--Congresses.
Cities and towns--Drama--History and criticism--Congresses.
Musical theater--History--Congresses.
Opera--Congresses.
Theater--History--Congresses.
Weill, Kurt, 1900-1950--Criticism and interpretation--Congresses.
Harvard subject headings:
Cities and towns in literature
Cities and towns--Drama--History and criticism.
Princeton subject headings:
Brecht, Bertolt, 1898-1956--Criticism and interpretation--Congresses.
Cities and towns--Drama--History and criticism--Congresses.
Drama.
Musical theater--History--Congresses.
Opera--Congresses.
Theater--History--Congresses.
Weill, Kurt, 1900-1950--Criticism and interpretation--Congresses.