Columbia subject headings:
Harvard subject headings:
Hildegard, Saint, 1098-1179--Influence--Congresses.
Medievalism--Congresses.
Music--20th century--History and criticism--Congresses.
Music--500-1400--History and criticism--Congresses.
Princeton subject headings:
Hildegard,--Influence (Literary, artistic, etc.)--Congresses.
Medievalism--Congresses.
Music--20th century--History and criticism--Congresses.
Music--500-1400--History and criticism--Congresses.