Columbia subject headings:
Harvard subject headings:
Frederick II, King of Prussia, 1712-1786.
Germany--Intellectual life--18th century.
Presidents--United States--Biography
Prussia (Germany)--History--Frederick II, 1740-1786.
Prussia (Germany)--Kings and rulers--Biography.
United States--Intellectual life--18th century.
Washington, George, 1732-1799
Princeton subject headings:
Frederick II, King of Prussia, 1712-1786.
Heads of state--Biography.
Washington, George, 1732-1799.