Columbia subject headings:
Germany--History--1789-1900.
Westphalia (Germany)--History--19th century.
Harvard subject headings:
Prussia (Germany)--History--1815-1870.
Westphalia (Germany)--Economic conditions--19th century.
Westphalia (Germany)--History--19th century.
Westphalia (Germany)--Social conditions--19th century.
Princeton subject headings: