理查·德拉波尔 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "理查·德拉波尔" in Chinese language version.

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1books.google.com

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books.google.com

Richardson, Douglas. Plantagenet Ancestry: A Study in Colonial and Medieval Families, 2nd Edition. Royal ancestry series. Kimball G. Everingham (ed.). Baltimore, MD: Genealogical Pub. Co. 2011: 293. ISBN 978-1461045137.