Columbia subject headings:
Prussia (Germany)--Economic conditions.
Prussia (Germany)--Politics and government--1806-1848.
Prussia (Germany)--Social conditions.
Harvard subject headings:
Prussia (Germany)--Economic conditions.
Prussia (Germany)--Politics and government--1806-1848.
Prussia (Germany)--Social conditions.
Princeton subject headings:
Prussia (Germany)--Economic conditions.
Prussia (Germany)--Politics and government--1806-1848.
Prussia (Germany)--Social conditions.