References for Henry Pytches Boyce

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Sir B.Burke: A Genealogical History of the Peerages and Knightages of the British Empire. London, 1953
F. Freytag v.Loringhoven: Europäische Stammtafeln, Band III, Tafel 158. Marburg, 1956 (1964)
M.A.H., Marquis de Ruvigny: The Plantagenet roll of the blood royal, ? Volume. 1905/1908