Columbia subject headings:
Harvard subject headings:
Archives--Germany--North Rhine-Westphalia--Catalogs.
Cleve (Duchy)--History--Sources--Bibliography--Catalogs.
Princeton subject headings:
Archives--Germany (West)--North Rhine-Westphalia--Catalogs.
Cleve (Duchy)--History--Sources--Bibliography--Catalogs.
Nordrhein-Westfälisches Hauptstaatsarchiv--Catalogs.