Columbia subject headings:
Music and language.
Music and literature.
Music--20th century.
Harvard subject headings:
Europe--Intellectual life--20th century--Congresses.
Music and literature--History--20th century--Congresses.
Music--20th century--Congresses
Princeton subject headings:
Europe--Intellectual life--20th century--Congresses.
Music and literature--History--20th century--Congresses.
Music--20th century--Congresses.