Columbia subject headings:
German literature--20th century--History and criticism.
Social problems in literature.
Working class in literature.
Harvard subject headings:
German literature--20th century--Bibliography
German literature--20th century--History and criticism
Social problems in literature.
Working class in literature--Bibliography.
Working class in literature.
Working class writings, German--History and criticism.
Princeton subject headings:
German literature--20th century--History and criticism.
Social problems in literature.
Working class in literature.