Columbia subject headings:
Germany--History--1789-1900.
Politicians--Germany--Cologne--Biography.
Wittgenstein, Heinrich von, 1797-1869.
Harvard subject headings:
Businessmen--Germany--Cologne--Biography.
Cologne (Germany)--Politics and government.
Politicians--Germany--Cologne--Biography.
Wittgenstein, Heinrich von, 1797-1869.
Princeton subject headings:
Germany--History--1789-1900.
Politicians--Germany (West)--Cologne--Biography.
Wittgenstein, Heinrich von, 1797-1869.