Columbia subject headings:
Authors, German--Homes and haunts--Congresses.
German literature--History and criticism--Congresses.
German literature--Themes, motives--Congresses.
Germany, Northern--In literature--Congresses.
Harvard subject headings:
Authors, Low German--19th century--Congresses.
Fritz Reuter Gesellschaft--Congresses.
German literature--Germany, Northern--History and criticism--Congresses.
Germany, Northern--In literature--Congresses.
Low German literature--19th century--History and criticism--Congresses.
Princeton subject headings:
Authors, German--Homes and haunts--Congresses.
German literature--History and criticism--Congresses.
German literature--Themes, motives--Congresses.
Germany, Northern--In literature--Congresses.