math on paper (some interesting facts about paper)

2007-07-09 13:18:35

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http://betweenborders.com/wordsmithing/a4-vs-us-letter/

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math on paper (some...

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乱弹

math on paper (some interesting facts about paper)

乱弹 (2007-07-09 13:18:35) 评论 (0)

http://betweenborders.com/wordsmithing/a4-vs-us-letter/