Columbia subject headings:
Harvard subject headings:
Aristotle--Contributions in music.
Music theory--History--500-1400.
Music--Philosophy and aesthetics
Plato--Contributions in music.
Plotinus--Contributions in music.
Pythagoras--Contributions in music.
Princeton subject headings:
Aristotle--Contributions in music.
Music and philosophy.
Music--Philosophy and aesthetics.
Philosophy, Ancient.
Plato--Contributions in music.
Plotinus--Contributions in music.
Pythagoras--Contributions in music.