Columbia subject headings:
Harvard subject headings:
German literature--History and criticism--Congresses
Lauenburg (Duchy)--History--Congresses.
Lauenburg (Duchy)--In literature--Congresses.
Princeton subject headings:
German literature--History and criticism--Congresses.
Lauenburg (Duchy)--History--Congresses.
Lauenburg (Duchy)--In literature--Congresses.