Columbia subject headings:
Music theory--Early works to 1800.
Music, Greek and Roman--History and criticism--Early works to 1800.
Skepticism--Early works to 1800.
Harvard subject headings:
Music theory--Early works to 1800
Music, Greek and Roman--History and criticism--Early works to 1800
Skepticism--Early works to 1800
Princeton subject headings:
Music theory--History--To 500.
Music, Greek and Roman--History and criticism.
Skepticism.