Columbia subject headings:
Faroe Islands--History.
Iceland--History--To 1262.
Ideology--History--To 1500.
Ireland--History--To 1603.
Kings and rulers--History--To 1500.
Middle Ages.
Orkney (Scotland)--History.
Power (Social sciences)--History--To 1500.
Scandinavia--History--To 1397.
Vikings--History.
Harvard subject headings:
Faroe Islands--History.
Iceland--History--To 1262.
Ideology--History--To 1500.
Ireland--History--To 1603.
Kings and rulers--History--To 1500.
Middle Ages
Orkney (Scotland)--History.
Power (Social sciences)--History--To 1500.
Scandinavia--History--To 1397.
Vikings--History.
Princeton subject headings:
Faroe Islands--History.
Iceland--History--To 1262.
Ideology--History--To 1500.
Ireland--History--To 1603.
Kings and rulers--History--To 1500.
Middle Ages.
Orkney (Scotland)--History.
Power (Social sciences)--History--To 1500.
Scandinavia--History--To 1397.
Vikings--History.