Columbia subject headings:
Apennines (Italy)--Social life and customs--Congresses.
Civilization, Medieval--Congresses.
Human settlements--Italy--Apennines Region--History--Congresses.
Harvard subject headings:
Apennines (Italy)--Population--History--Congresses.
Apennines (Italy)--Social life and customs--Congresses.
Civilization, Medieval--Congresses
Excavations (Archaeology)--Italy--Apennines--Congresses.
Human settlements--Italy--Apennines Region--History--Congresses.
Roads--Italy--Apennines--History--Congresses.
Princeton subject headings:
Apennines (Italy)--Population--History--Congresses.
Excavations (Archaeology)--Italy--Apennines--Congresses.
Roads--Italy--Apennines--History--Congresses.