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[1] RLM文字 ‏ - faireal.net http://www.faireal.net/articles/7/11/#d30312

[2] ir1981.PDF - 198.pdf, , https://itscj.ipsj.or.jp/ir/198.pdf

[3] Microsoft Word - reg9_v3_.doc - 234.pdf, , https://itscj.ipsj.or.jp/ir/234.pdf