Columbia subject headings:
Harvard subject headings:
Schaumburg-Lippe (Germany)--Antiquities--Congresses.
Schaumburg-Lippe (Germany)--History--To 1500--Congresses.
Princeton subject headings:
Schaumburg-Lippe (Germany)--Antiquities--Congresses.
Schaumburg-Lippe (Germany)--History--To 1500--Congresses.