http://homepage2.nifty.com/mukyu/ref/guide/on.html
−移転→ http://takagi1.net/ref/guide/on.html
−移転→ https://takagi1.net/ref/guide/on.html
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英語リンク
http://www.h5.dion.ne.jp/~wing-x/academic/english/link/index.html
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−移転→ https://takagi1.net/academic/english/link/index.html