Columbia subject headings:
Music--France--20th century--History and criticism--Congresses.
Music--Germany--20th century--History and criticism--Congresses.
Harvard subject headings:
Music--France--20th century--Congresses.
Music--France--20th century--History--Congresses.
Music--Germany--20th century--Congresses
Music--Germany--20th century--History--Congresses.
Princeton subject headings:
Music--France--20th century--History--Congresses.
Music--Germany--20th century--History--Congresses.