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