Columbia subject headings:
Harvard subject headings:
Francesco Sforza, Duke of Milan, 1401-1466.
Galeazzo Maria Sforza, Duke of Milan, 1444-1476.
Gian Galeazzo Sforza, Duke of Milan, 1469-1494.
Ticino (Switzerland)--History--Sources.
Princeton subject headings:
Milan (Italy)--History--To 1535--Sources.
Sforza family--Correspondence.
Ticino (Switzerland)--History--Sources.