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Richardson, Douglas. Everingham, Kimball G. , 编. Magna Carta Ancestry: A Study in Colonial and Medieval Families III 2nd. Salt Lake City. 2011. ISBN 978-1-4499-6639-3.
Richardson, Douglas. Everingham, Kimball G. , 编. Plantagenet Ancestry: A Study in Colonial and Medieval Families I 2nd. Salt Lake City. 2011. ISBN 978-1-4499-6631-7.