Columbia subject headings:
Lippe (Germany : Kreis)--History--Sources.
North Rhine-Westphalia (Germany)--History--Sources.
Harvard subject headings:
Lippe (Germany : Kreis)--History--Sources.
North Rhine-Westphalia (Germany)--History--Sources.
Princeton subject headings:
Lippe (Germany)--History--Sources.
Lippe (Germany)--Politics and government--Sources.