Columbia subject headings:
Kotzebue, August von, 1761-1819--Congresses.
Harvard subject headings:
German literature--Estonia--History and criticism--Congresses.
German literature--Germany--History and criticism--Congresses.
Kotzebue, August von, 1761-1819--Criticism and interpretation--Congresses.
Princeton subject headings:
Kotzebue, August von, 1761-1819--Congresses.