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- [S336463] Medieval Lands: A prosopography of medieval European noble and royal families, Charles Cawley, (Online: The Foundation for Medieval Genealogy at http://fmg.ac/Projects/MedLands/, 20XX), "JULIANE de Ponte de l'Arche (-15 Nov 1217, bur Bristol St Augustine)" at http://fmg.ac/Projects/MedLands/ENGLISHNOBILITYMEDIEVAL3P-S.htm#JulianePontArcheMRobertBerkeley.
- [S421] The Greatest Knight: The Remarkable Life of William Marshal, the Power Behind Five English Thrones, Thomas Asbridge, (New York: HarperCollins, 2014), 162.
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