Columbia subject headings:
Harvard subject headings:
Composers--France--20th century--Congresses.
Messiaen, Olivier, 1908-1992--Criticism and interpretation--Congresses.
Music--France--20th century--Congresses.
Organists--France--Congresses.
Princeton subject headings:
Messiaen, Olivier, 1908-1992--Criticism and interpretation--Congresses.
Music--France--Congresses.