Columbia subject headings:
Augustine, of Hippo, Saint, 354-430.
Boethius, -524.
Church music--500-1400.
Church music--To 500.
Music--500-1400--Philosophy and aesthetics.
Music--Moral and ethical aspects.
Music--To 500--Philosophy and aesthetics.
Music.
Harvard subject headings:
Augustine, of Hippo, Saint, 354-430
Boethius, -524
Music--500-1400--Philosophy and aesthetics.
Music--To 500--Philosophy and aesthetics.
Princeton subject headings:
Augustine, of Hippo, Saint, 354-430.
Boethius, -524.
Church music--500-1400.
Church music--To 500.
Music--500-1400--Philosophy and aesthetics.
Music--Moral and ethical aspects.
Music--To 500--Philosophy and aesthetics.