Columbia subject headings:
Harvard subject headings:
German literature--Baltic Sea Region--History and criticism--Congresses.
German literature--Germany--Lüneburg Heath--History and criticism--Congresses.
Low German literature--Baltic Sea Region--History and criticism--Congresses.
Low German literature--Germany--Lüneburg Heath--History and criticism--Congresses.
Princeton subject headings:
German literature--Germany, Northern--History and criticism--Congresses.
Low German literature--History and criticism--Congresses.