Columbia subject headings:
Italy--Church history--476-1400--Sources.
Italy--History--476-1492--Sources.
Milan (Italy)--Church history--Sources--Middle Ages, 600-1500.
Milan (Italy)--History--Sources--Middle Ages, 600-1500.
Harvard subject headings:
Holy Roman Empire--History--843-1273--Sources.
Italy--History--Germanic rule, 962-1268--Sources.
Milan (Italy)--History--To 1535--Sources.
Princeton subject headings:
Milan (Italy)--Church history--Sources.
Milan (Italy)--History--To 1535--Sources.