Columbia subject headings:
Harvard subject headings:
Borso d'Este, Duke of Ferrara, Modena, and Reggio, 1413-1471.
Ferrara (Italy)--History--Sources.
Princeton subject headings:
Borso d'Este, Duke of Ferrara, Modena, and Reggio, 1413-1471.
Education of princes--Early works to 1800.
Kings and rulers--Duties--Early works to 1800.