Bera, Count of Barcelona (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Bera, Count of Barcelona" in English language version.

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books.google.com

Valverde, Luis Amela (2021-10-28). Varia historicorum I (in Spanish). Punto Rojo Libros. p. 541. ISBN 978-84-19090-43-0.

"Archived copy". Archived from the original on 2013-10-12. Retrieved 2013-05-02.{{cite web}}: CS1 maint: archived copy as title (link)

Archibald Lewis, The Development of Southern French and Catalan Society, 718-1050, Chapter 3.

"Archived copy". Archived from the original on 2013-10-12. Retrieved 2013-05-02.{{cite web}}: CS1 maint: archived copy as title (link)