Columbia subject headings:
Music--20th century--History and criticism--Congresses.
Music--Austria--Vienna--20th century--History and criticism--Congresses.
Twelve-tone system--Congresses.
Harvard subject headings:
Music--20th century--History and criticism
Princeton subject headings:
Berg, Alban, 1885-1935.
Eisler, Hanns, 1898-1962.
Music--20th century--History and criticism.
Music--Congresses.
Schoenberg, Arnold, 1874-1951.
Webern, Anton, 1883-1945.