Columbia subject headings:
Composition (Music)
Germany (West)--History.
Lachenmann, Helmut--Criticism and interpretation.
Music--Social aspects--Germany (West)
Protest movements--Germany (West)--History.
Socialism and music.
Socialism--Germany (West)
Harvard subject headings:
Composers--Germany--Biography
Lachenmann, Helmut--Childhood and youth.
Princeton subject headings: