Abas I da Arménia (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Abas I da Arménia" in Portuguese language version.

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2books.google.com

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books.google.com

Steven Runciman. The Emperor Romanus Lecapenus and His Reign: A Study of Tenth-Century Byzantium. Cambridge University Press; 25 August 1988. ISBN 978-0-521-35722-7. p. 156–157.
History of Armenia: From B.C. 2247 to the Year of Christ 1780, Or 1229 of the Armenian Era. Printed at Bishop's College Press, by H. Townsend; 1827. p. 85.