Columbia subject headings:
Harvard subject headings:
Dramatists, Italian--18th century--Criticism and interpretation.
Libretto.
Melodrama, Italian--18th century--History and criticism.
Metastasio, Pietro, 1698-1782--Criticism and interpretation.
Opera--Italy--18th century--History and criticism.
Princeton subject headings:
Libretto.
Melodrama.
Metastasio, Pietro, 1698-1782--Criticism and interpretation.
Opera--18th century.