Columbia subject headings:
Britons.
Celts--Great Britain.
Great Britain--Antiquities, Celtic.
Great Britain--History--To 1066.
Harvard subject headings:
Celts--Great Britain.
Great Britain--Antiquities, Celtic.
Great Britain--History--Anglo-Saxon period, 449-1066.
Great Britain--History--Roman period, 55 B.C.-449 A.D.
Princeton subject headings:
Great Britain--Antiquities.
Great Britain--History--Anglo-Saxon period, 449-1066.