Philosophical Diamond Signs

Ask E.T 2013-07-11

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http://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=0003pg&topic_id=1

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#edutech ยป Edward Tufte

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Date tagged:

07/11/2013, 14:21

Date published:

07/10/2013, 16:47