Columbia subject headings:
Harvard subject headings:
Frederick II, King of Prussia, 1712-1786.
Mercantile system--Germany--Prussia--History--18th century.
Reason of state--History--18th century.
Silesia--Commercial policy--History--18th century.
Tariff--Germany--Westphalia--History--18th century.
Tariff--Silesia--History--18th century.
Westphalia (Germany)--Commercial policy--History--18th century.
Princeton subject headings:
Finance, Public--Germany--History--18th century.
Tariff--Germany--History--18th century.