Frederico I do Sacro Império Romano-Germânico (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Frederico I do Sacro Império Romano-Germânico" in Portuguese language version.

refsWebsite

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23^rd place

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202^nd place

archive.org

Walford, Cox & Apperson 1885, p. 119 Walford, Edward; Cox, John Charles; Apperson, George Latimer (1885). «Digit folklore, part II». The Antiquary. XI: 119–123

fordham.edu

The Crusade of Frederick Barbarossa: Letters, Fordham University.

google.co.uk

books.google.co.uk

Cantor, Norman F. (1993). The Civilization of the Middle Ages. New York: HarperCollins. p. 309. ISBN 0060170336. Consultado em 23 de dezembro de 2016

newadvent.org

Kampers, Franz. "Frederick I (Barbarossa)". The Catholic Encyclopedia. Vol. 6. New York: Robert Appleton Company, 1909. 21 de maio de 2009.

yale.edu

avalon.law.yale.edu

«Peace of the Land Established by Frederick Barbarossa Between 1152 and 1157 A.D.». Yale Law School. Consultado em 22 de dezembro de 2016
Yale Avalon project