Columbia subject headings:
Harvard subject headings:
Forestry in literature.
Forests and forestry--Germany--History--19th century.
Forests and forestry--Germany--History--20th century.
Forests in literature.
German poetry--19th century--History and criticism
German poetry--20th century--History and criticism
Ideology--Germany--History--19th century.
Ideology--Germany--History--20th century.
Princeton subject headings:
Forestry in literature.
Forests and forestry--Germany--History--19th century.
Forests and forestry--Germany--History--20th century.
Forests in literature.
German poetry--19th century--History and criticism.
German poetry--20th century--History and criticism.
Ideology--Germany--History--19th century.
Ideology--Germany--History--20th century.