Columbia subject headings:
Frederick II, King of Prussia, 1712-1786--Friends and associates.
Prussia (Germany)--Biography.
Prussia (Germany)--History--Frederick II, 1740-1786.
Harvard subject headings:
Frederick II, King of Prussia, 1712-1786--Friends and associates.
Prussia (Germany)--Biography.
Prussia (Germany)--History--Frederick II, 1740-1786.
Princeton subject headings:
Frederick II, King of Prussia, 1712-1786--Friends and associates.
Prussia (Germany)--History--Frederick II, 1740-1786.