Columbia subject headings:
Mercantile system--Germany--Prussia--History.
Middle class--Germany--Prussia--History.
Prussia (Germany)--Economic policy.
Harvard subject headings:
Mercantile system--Germany--Prussia--History.
Middle class--Germany--Prussia--History.
Prussia (Germany)--Economic policy.
Princeton subject headings:
Mercantile system--Germany--Prussia--History.
Middle class--Germany--Prussia--History.
Prussia (Germany)--Economic conditions.
Prussia (Germany)--Politics and government--1740-1786.