Columbia subject headings:
Musical theater--Germany--History--20th century.
National socialism and music--History--20th century.
Operetta--Germany--History--20th century.
Harvard subject headings:
Musical theater--Germany--History--20th century.
National socialism and music--History--20th century.
Operetta--Germany--History--20th century.
Princeton subject headings:
Germany--Cultural policy--History--20th century.
Musical theater--Germany--History--20th century.
National socialism and music.
Operetta--Germany--History--20th century.