Columbia subject headings:
Celtic antiquities--Congresses.
Celts--Europe--History--Congresses.
Civilization, Celtic--Congresses.
Elite (Social sciences)--Europe--History--Congresses.
Urbanization--Europe--History--Congresses.
Harvard subject headings:
Celtic antiquities--Congresses.
Celts--Europe--History--Congresses.
Civilization, Celtic--Congresses.
Elite (Social sciences)--Europe--History--Congresses.
Hallstatt period--Congresses.
Land settlement--Europe--History--Congresses.
Urbanization--Europe--History--Congresses.
Princeton subject headings:
Celtic antiquities--Congresses.
Celts--Europe--History--Congresses.
Civilization, Celtic--Congresses.
Elite (Social sciences)--Europe--History--Congresses.
Urbanization--Europe--History--Congresses.