Roger de Clare, II conde de Hertford (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Roger de Clare, II conde de Hertford" in Spanish language version.

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1books.google.com

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1wikisource.org

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books.google.com

Burke, John (1846). A General and Heraldic Dictionary of the Peerages of England, Ireland, and Scotland, extinct, dormant, and in abeyance (3rd edición). London. p. 121. Consultado el 20 de enero de 2019.

wikisource.org

en.wikisource.org

«Clare Roger de, Fifth Earl of Clare and Third Earl of Hertford». Dictionary of National Biography 10: 397. 1887.