Columbia subject headings:
German literature--19th century--History and criticism--Congresses.
German literature--20th century--History and criticism--Congresses.
Harvard subject headings:
German literature--19th century--History and criticism
German literature--20th century--History and criticism
Hölderlin, Friedrich, 1770-1843--Appreciation.
Hölderlin, Friedrich, 1770-1843--Criticism and interpretation.
Princeton subject headings:
German literature--19th century--History and criticism--Congresses.
German literature--20th century--History and criticism--Congresses.