Columbia subject headings:
Harvard subject headings:
Eurydice (Greek mythological character)--Drama.
Gluck, Christoph Willibald, Ritter von, 1714-1787--Discography.
Gluck, Christoph Willibald, Ritter von, 1714-1787. Orfeo ed Euridice.
Opera programs--Italy--Florence.
Operas--Librettos
Orpheus (Greek mythological character)--Drama.
Princeton subject headings:
Drama.
Eurydice (Greek mythological character)--Drama.
Librettos.
Operas--Librettos.
Orpheus (Greek mythological character)--Drama.