Columbia subject headings:
German literature--19th century--History and criticism.
Germany--History--1848-1870.
Social problems in literature.
Harvard subject headings:
German literature--19th century--History and criticism
Germany--History--1848-1870.
Social problems in literature.
Princeton subject headings:
German literature--19th century--History and criticism.
Germany--History--1848-1870.
Realism in literature.
Social problems in literature.