Columbia subject headings:
Italy--Civilization--Polish influences--Congresses.
Italy--Relations--Poland--Congresses.
Poland--Civilization--Italian influences--Congresses.
Poland--Relations--Italy--Congresses.
Harvard subject headings:
Italy--Civilization--Polish influences--Congresses.
Italy--Relations--Poland--Congresses.
Poland--Civilization--Italian influences--Congresses.
Poland--Relations--Italy--Congresses.
Princeton subject headings:
Italy--Civilization--Polish influences--Congresses.
Italy--Relations--Poland--Congresses.
Poland--Civilization--Italian influences--Congresses.
Poland--Relations--Italy--Congresses.