Columbia subject headings:
Genoa (Italy)--Civilization--Congresses.
Genoa (Italy)--Relations--Italy--Palermo--Congresses.
Palermo (Italy)--Civilization--Congresses.
Palermo (Italy)--Relations--Italy--Genoa--Congresses.
Harvard subject headings:
Genoa (Italy)--Civilization--Congresses.
Genoa (Italy)--Relations--Italy--Palermo--Congresses.
Palermo (Italy)--Civilization--Congresses.
Palermo (Italy)--Relations--Italy--Genoa--Congresses.
Princeton subject headings:
Genoa (Italy)--Civilization--Congresses.
Genoa (Italy)--Relations--Italy--Palermo--Congresses.
Palermo (Italy)--Civilization--Congresses.
Palermo (Italy)--Relations--Italy--Genoa--Congresses.