Columbia subject headings:
Anglo-Saxons--England--Mercia (Kingdom)
England--Civilization--To 1066.
Great Britain--History--Anglo-Saxon period, 449-1066.
Mercia (Kingdom)
Harvard subject headings:
Anglo-Saxons--Mercia (Kingdom)
England--Civilization--To 1066.
Great Britain--History--Anglo Saxon period, 449-1066.
Mercia (Kingdom)
Princeton subject headings:
Mercia (Kingdom)--History.