References for Robert 1st Marquess Stewart * of Londonderry

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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
F. Freytag v.Loringhoven: Europäische Stammtafeln, Band IV, Tafel 157. Marburg, 1957 (1968)