References for Sir Walter Francis John 9th Duke, 11th Duke Montagu-Douglas-Scott * of Buccleuch * of Queensberry

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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
Gothaischer genealogischer Hofkalender auf das Jahr 1929. J.Perthes, Gotha, 1928
D.Schwennicke: Europäische Stammtafeln, Vol. III/2, Tafel 370. Marburg, 1983