SOURCE-06557Research NeededProbable
Duffy, Brian Bóruma, [Brian Boru] (c.941–1014), Oxford Dictionary of National Bi...
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Duffy, Brian Bóruma, [Brian Boru] (c.941–1014), Oxford Dictionary of National Biography, accessed 23 June 2014, amb
Duffy, Brian Bóruma, [Brian Boru] (c.941–1014), Oxford Dictionary of National Biography, accessed 23 June 2014, amb