Columbia subject headings:
North Rhine-Westphalia (Germany)--History.
North Rhine-Westphalia (Germany)--Politics and government.
Harvard subject headings:
North Rhine-Westphalia (Germany)--History.
North Rhine-Westphalia (Germany)--Politics and government.
Princeton subject headings:
Legislative bodies--Germany (West)--North Rhine-Westphalia.
North Rhine-Westphalia (Germany)--Politics and government.