Columbia subject headings:
Music theory--History--500-1400--Bibliography.
Music--500-1400--Bibliography.
Harvard subject headings:
Music theory--History--500-1400--Bibliography.
Music--500-1400--History and criticism--Bibliography.
Princeton subject headings:
Music theory--History--15th century--Bibliography.
Music theory--History--500-1400--Bibliography.
Music--15th century--History and criticism--Bibliography.
Music--500-1400--History and criticism--Bibliography.
Music--Bibliography.