Columbia subject headings:
Europe--History--476-1492.
Europe--Relations--Great Britain.
Great Britain--History--To 1066.
Great Britain--Relations--Europe.
Migrations of nations.
Harvard subject headings:
Europe--Foreign relations--Great Britain.
Europe--History--476-1492.
Great Britain--Foreign relations--Europe.
Great Britain--History.
Princeton subject headings:
Europe--Foreign relations--Great Britain.
Europe--History--To 1500.
Great Britain--Foreign relations--Europe.
Great Britain--History--To 1500.