Columbia subject headings:
Harvard subject headings:
Democracy--Germany--North Rhine-Westphalia--History--20th century.
Local government--Germany--North Rhine-Westphalia--History--20th century.
North Rhine-Westphalia (Germany)--Administrative and political divisions--History--20th century.
North Rhine-Westphalia (Germany)--Politics and government--20th century.
Political participation--Germany--North Rhine-Westphalia--History--20th century.
Princeton subject headings:
Democracy--Germany--North Rhine-Westphalia--History--20th century.
Local government--Germany--North Rhine-Westphalia--History--20th century.
North Rhine-Westphalia (Germany)--Administrative and political divisions--History--20th century.
North Rhine-Westphalia (Germany)--Politics and government--20th century.
Political participation--Germany--North Rhine-Westphalia--History--20th century.