Columbia subject headings:
German drama--18th century--History and criticism.
Melodrama.
Opera--Germany.
Theater--Germany--History--18th century.
Harvard subject headings:
German drama--18th century--History and criticism.
Melodrama, German--History and criticism.
Melodrama.
Opera--Germany
Theater--Germany--History--18th century.
Princeton subject headings:
German drama--18th century--History and criticism.
Melodrama.
Opera--Germany--18th century.
Theater--Germany--History--18th century.