Columbia subject headings:
Harvard subject headings:
Europe--Antiquities--Congresses.
Iron age--Europe--Congresses.
Princeton subject headings:
Cities and towns, Ancient--Europe--Congresses.
Europe--Antiquities--Congresses.
Excavations (Archaeology)--Europe--Congresses.
Iron age--Europe--Congresses.
Iron age--France--Congresses.
Urbanization--Europe--History--Congresses.