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誰的比較長?

Mo Sun-aeng

出版	世一文化, 2007
ISBN	98641895579789864189557
URL	http://books.google.com.hk/books?id=f1e3tgAACAAJ&hl=&source=gbs_api

註釋

Introducing two concepts of mathematics. First story is about length and height ; second story is about shapes.