Columbia subject headings:
Harvard subject headings:
Communism and music--Congresses.
Eisler, Hanns, 1898-1962--Congresses.
Revolutionary ballads and songs--Congresses.
Princeton subject headings:
Communism and music--Congresses.
Eisler, Hanns, 1898-1962--Congresses.
Revolutionary ballads and songs--Congresses.