Columbia subject headings:
Harvard subject headings:
German literature--20th century--History and criticism
Popular culture and literature.
Popular culture in literature.
Popular culture--Germany--History--20th century
Princeton subject headings:
Popular culture and literature--Germany--History--20th century.
Popular culture and literature--United States--History--20th century.
Popular culture--Germany--History--20th century.
Popular culture--United States--History--20th century.