Columbia subject headings:
Harvard subject headings:
Archival resources--Portugal.
Italians--Portugal--History--Sources.
Italy--Relations--Portugal--Sources.
Portugal--Civilization--Italian influences--Sources.
Portugal--Relations--Italy--Sources.
Princeton subject headings:
Archival resources--Portugal.
Italians--Portugal--History--Sources.
Italy--Relations--Portugal--Sources.
Portugal--Civilization--Italian influences--Sources.
Portugal--Relations--Italy--Sources.