Columbia subject headings:
Arts, German--20th century.
Arts, German.
Arts--Political aspects--Germany.
Politics and culture--Germany.
Working class in art.
Working class--Germany--Attitudes.
Harvard subject headings:
Arts, German.
Arts, Modern--20th century--Germany.
Arts--Political aspects--Germany.
Politics and culture--Germany.
Working class in art.
Working class--Germany--Attitudes.
Princeton subject headings:
Literature and society.
Theater--Germany--Political aspects.
Working class--Germany--Political activity.