Beatrice of Swabia (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Beatrice of Swabia" in English language version.

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2books.google.com

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archive.org

Commire, Anne, ed. (8 October 1999). "Beatrice of Swabia (1198–1235)". Women in World History. Gale. p. 309. ISBN 978-0-7876-4061-3 – via Encyclopedia.com.

books.google.com

Haverkamp, Alfred; Vollrath, Hanna; Leyser, Karl (1996). England and Germany in the High Middle Ages. German Historical Institute London. ISBN 978-0-19-920504-2.
Jones, Michael (1 July 1989). England and her Neighbours, 1066-1453: Essays in Honour of Pierre Chaplais. Bloomsbury Publishing. ISBN 978-0-8264-3374-9.