Columbia subject headings:
Harvard subject headings:
Business and politics--Germany--North Rhine-Westphalia--History.
Businessmen--Germany--North Rhine-Westphalia--History.
Businesspeople--Germany--North Rhine-Westphalia--History.
Germany--Politics and government--1789-1900.
Princeton subject headings:
Business and politics--Germany, West--North Rhine Westphalia--History.
Businessmen--Germany, West--North Rhine-Westphalia--History.
Germany--Politics and government--1789-1900.