References for George Augustus 11th Earl, 8th Earl Herbert * of Pembroke * of Montgomery

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Sir B.Burke: A Genealogical History of the Peerages and Knightages of the British Empire. London, 1953
Sir B.Burke: Burke's Peerage and Baronetage. London, 1999
D.Schwennicke: Europäische Stammtafeln, Vol. III/2, Tafel 383. Marburg, 1983