Vilém II., vévoda z Apulie (Czech Wikipedia)

Analysis of information sources in references of the Wikipedia article "Vilém II., vévoda z Apulie" in Czech language version.

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archive.org

  • MATTHEW, Donald. The Norman Kingdom of Sicily. [s.l.]: Cambridge University Press, 1992. Dostupné online. S. 19, 20. (anglicky)