Jōgen (Heian period) (Simple English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Jōgen (Heian period)" in Simple English language version.

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Nussbaum, Louis-Frédéric. (2005). "Jōgen" in Japan Encyclopedia, p. 429.
Titsingh, Isaac. (1834). Annales des empereurs du japon, pp. 144-146; Brown, Delmer et al. (1979). Gukanshō, p. 299-300; Varely, H. Paul. (1980). Jinnō Shōtōki, pp. 191-192.
Titsingh, p. 145.
Titsingh, p. 146.