8、本の話 『√2がこんな所にある A判とB判 新書判と黄金比 三角定規の秘密 ドラドラえもん 0.9999・・・=1』 (1991.3)
[url]http://hamaguri.sakura.ne.jp/book1.html[/url]
- Target Group (Age)
- 3 – 19+
- Language
- Japanese / 日本語
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