References for Francis Godolphin of Godolphin

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G.E. Cokayne, et al.: The Complete Peerage, Vol V, p.747. London, 1921-1926, The St. Catherine Press, ltd.
Genealogisches Handbuch des Adels -- Fürstliche Häuser, Band 7. Glücksburg, 1964
Sir B.Burke: The Dormant and Extinct Peerage. London, 1866