Columbia subject headings:
Harvard subject headings:
Commerce, Prehistoric--Gaul--Congresses.
Commerce, Prehistoric--Great Britain--Congresses.
Gaul--Antiquities--Congresses.
Great Britain--Antiquities--Congresses.
Iron age--Gaul--Congresses.
Iron age--Great Britain--Congresses.
Princeton subject headings:
Comerce, Prehistoric--Gaul--Congresses.
Commerce, Prehistoric--Great Britain--Congresses.
Gaul--Antiquities--Congresses.
Great Britain--Antiquities--Congresses.
Iron age--Gaul--Congresses.
Iron age--Great Britain--Congresses.