Columbia subject headings:
Milan (Italy)--Foreign relations--Sources.
Milan (Italy)--History--1535-1859--Sources.
Milan (Italy)--History--To 1535--Sources.
Harvard subject headings:
Milan (Italy)--Foreign relations--Sources.
Milan (Italy)--History--1535-1859--Sources.
Milan (Italy)--History--To 1535--Sources.
Princeton subject headings: