Columbia subject headings:
Harmony of the spheres in literature.
Orpheus (Greek mythological character)--In literature.
Songs and music.
Virgil--Knowledge and learning.
Harvard subject headings:
Harmony of the spheres in literature.
Orpheus (Greek mythological character)--In literature.
Virgil--Knowledge--Music.
Princeton subject headings:
Harmony of the spheres.
Music, Greek and Roman--History and criticism.
Orpheus (Greek mythological character)