Αλμπέρικ Α΄ του Σπολέτο (Greek Wikipedia)

Analysis of information sources in references of the Wikipedia article "Αλμπέρικ Α΄ του Σπολέτο" in Greek language version.

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2books.google.com

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books.google.com

Hinson, E. Glenn. The Church Triumphant: A History of Christianity Up to 1300, Mercer University Press, 1995, (ISBN 9780865544369) p. 358
Squatriti, Paolo. "Garigliano, Battle of", Medieval Italy: an Encyclopedia, (Christopher Kleinhenz, ed.), Routledge, 2004, (ISBN 9781135948801), p. 398

newadvent.org

Mann, Horace. "Pope Sergius III." The Catholic Encyclopedia Vol. 13. New York: Robert Appleton Company, 1912. 23 September 2017