References for Gunnora d'Aubigny
Sir B.Burke:
The Dormant and Extinct Peerage.
London, 1866
D.Schwennicke:
Europäische Stammtafeln, Vol. XIII, Tafel 104.
Marburg, 1990
F.L.Weis:
Ancestral Roots of Sixty Colonists.
6th Ed., Baltimore, 1988