References for Katharina Sophie Graefin de Salis de Soglio

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Genealogisches Handbuch des Adels - Gräfliche Häuser, Vol.A2. Limburg/Lahn, 1955
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
Genealogisches Taschenbuch der deutschen gräflichen Häuser 1872. J.Perthes, Gotha, 1872