[1] 沖縄の歴史情報 第4巻 (2/7/2016, 12:09:15 PM 版) http://www.okinawa.oiu.ac.jp/cd/dai-4/4-4.htm
[2] 橡4104.PDF - 4104.pdf, 2/14/2014, 8:04:32 AM, 9/12/2021, 4:05:16 AM http://www.tulips.tsukuba.ac.jp/limedio/dlam/B95/B952214/1/dai-1/mokuji/4104.pdf
[3] eKanji misc. data, 5/5/2022, 2:25:17 PM, 8/24/2000, 10:19:45 AM https://web.archive.org/web/20000824101917/http://www.zinbun.kyoto-u.ac.jp/~ekanji/data.html
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