References for Charles Marquess Somerset * of Worcester

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J.W. v.Imhof: Regum pariumque Magnae Britanniae historia genealogica, tab . Nürnberg, 1690
M.A.H., Marquis de Ruvigny: The Plantagenet roll of the blood royal, Clarence Volume. London, Edinburgh, 1905
F.M.Powicke, E.B.Fryde: Handbook of British Chronology. London, 1961