Chaume, M. (1925) "Les origines du duché de Bourgogne" (Dijon) Vol. I, p. 534, c...

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Chaume, M. (1925) "Les origines du duché de Bourgogne" (Dijon) Vol. I, p. 534, cited on MedLands - Central France: Gerberge m. Foulques II Anjou