Columbia subject headings:
Harvard subject headings:
Germany--Economic conditions--19th century.
Germany--History--1789-1900.
Germany--Politics and government--1789-1900
Prussia (Germany)--Economic conditions.
Prussia (Germany)--History--1789-1900.
Prussia (Germany)--Politics and government--1789-1900.
Princeton subject headings:
Germany--Economic conditions--19th century.
Germany--History--1789-1900.
Germany--Politics and government--1789-1900.