Columbia subject headings:
Composers--Interviews.
Internationale Ferienkurse für Neue Musik.
Music--Austria--Vienna--20th century--History and criticism.
Music--Germany--Darmstadt--20th century--Congresses.
Vienna (Austria)--Intellectual life.
Harvard subject headings:
Internationale Ferienkurse für Neue Musik.
Music--Austria--20th century--History and criticism--Congresses.
Music--Austria--Vienna--20th century--Congresses.
Music--Germany--Darmstadt--20th century--Congresses.
Vienna (Austria)--Intellectual life.
Princeton subject headings:
Internationale Ferienkurse für Neue Musik.
Music--20th century--Austria--Vienna--Congresses.
Music--20th century--Germany--Darmstadt--Congresses.
Vienna (Austria)--Intellectual life.