References for Edmund II. 3rd Duke Beaufort * of Somerset

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Sir B.Burke: The Dormant and Extinct Peerage. London, 1866
J. Dupont, J. Saillot: Cahiers de Saint-Louis. Nantes, Angers, 1976 etc.
M.A.H., Marquis de Ruvigny: The Plantagenet roll of the blood royal, Essex Volume. London, Edinburgh, 1908
D.Schwennicke: Europäische Stammtafeln, Vol. III/1, Tafel 157. Marburg, 1984