Columbia subject headings:
Music theory--History--500-1400--Congresses.
Music--15th century--Congresses.
Music--500-1400--Congresses.
Music--Instruction and study--Congresses.
Harvard subject headings:
Music--15th century--Congresses.
Music--16th century--Congresses.
Music--500-1400--Congresses.
Music--Instruction and study--Congresses
Princeton subject headings:
Music theory--History--500-1400--Congresses.
Music--15th century--Congresses.
Music--500-1400--Congresses.
Music--Instruction and study--Congresses.