Columbia subject headings:
Earthquakes--Greece.
Earthquakes--History--To 1500.
Earthquakes--Rome.
Harvard subject headings:
Earthquakes--Greece--History--Congresses.
Earthquakes--History--To 1500--Congresses.
Earthquakes--Rome--History--Congresses.
Princeton subject headings:
Earthquakes--Greece.
Earthquakes--History--To 1500.
Earthquakes--Rome.