Columbia subject headings:
Catholic Church. Archdiocese of Milan (Italy)--History--Sources.
Diplomatics, Italian--Italy--Milan.
Harvard subject headings:
Catholic Church. Archdiocese of Milan (Italy)--History--Sources.
Diplomatics, Italian--Italy--Milan.
Princeton subject headings:
Catholic Church. Archdiocese of Milan (Italy)--History--Sources.
Diplomatics, Italian--Italy--Milan.