Ivan Rival

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1PICTURE PUZZLING Mathematicians Are Rediscovering the Power of Pictorial Reasoning* by IVAN RIVAL M

PICTURE PUZZLING Mathematicians Are Rediscovering the Power of Pictorial Reasoning* by IVAN RIVAL M

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Source URL: www.ivanrival.com

Language: English - Date: 2010-09-26 08:28:03
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Source URL: www.ivanrival.com

Language: English - Date: 2010-09-26 08:27:58