Columbia subject headings:
Europe--History--1648-1789.
Frederick II, King of Prussia, 1712-1786--Encyclopedias.
Prussia (Germany)--History--Frederick II, 1740-1786.
Harvard subject headings:
Europe--History--1648-1789.
Frederick II, King of Prussia, 1712-1786--Encyclopedias.
Prussia (Germany)--History--Frederick II, 1740-1786.
Princeton subject headings:
Encyclopedias.
Europe--History--1648-1789.
Frederick II, King of Prussia, 1712-1786--Encyclopedias.
Prussia (Germany)--History--Frederick II, 1740-1786.