References for Walter de Lacy
D.Schwennicke:
Europäische Stammtafeln, Vol. III/4, Tafel 709.
Marburg, 1989
A.M.Stokvis:
Manuel d'histoire.
Amsterdam, 1966
F.L.Weis:
Ancestral Roots of Sixty Colonists.
6th Ed., Baltimore, 1988