Columbia subject headings:
Aristocracy (Social class)--Great Britain--History--To 1500.
Great Britain--History--1066-1687.
Great Britain--Social conditions.
Nobility--Great Britain--History--To 1500.
Harvard subject headings:
Aristocracy (Social class)--England--History--To 1500.
England--Social conditions--1066-1485.
Nobility--England--History--To 1500.
Power (Social sciences)--England--History--To 1500.
Princeton subject headings:
Aristocracy (Social class)--Great Britain--History--To 1500.
Great Britain--History--1066-1687.
Great Britain--Social conditions.
Nobility--Great Britain--History--To 1500.