Columbia subject headings:
Hungary--Civilization--20th century--Congresses.
Hungary--Relations--Italy--Congresses.
Italy--Civilization--20th century--Congresses.
Italy--Relations--Hungary--Congresses.
Harvard subject headings:
Hungary--Civilization--20th century--Congresses.
Hungary--Relations--Italy--Congresses.
Italy--Civilization--20th century--Congresses.
Italy--Relations--Hungary--Congresses.
Princeton subject headings:
Hungary--History--20th century--Congresses.
Hungary--Relations--Italy--Congresses.
Italy--History--20th century--Congresses.
Italy--Relations--Hungary--Congresses.