Columbia subject headings:
Harvard subject headings:
Eurydice (Greek mythological character)--In opera.
Opera--Italy--17th century.
Opera--Italy--18th century
Orpheus (Greek mythological character)--In opera.
Princeton subject headings:
Eurydice (Greek mythological character)--Songs and music--History and criticism.
Opera--Italy.
Orpheus (Greek mythological character)--Songs and music--History and criticism.