Best New Generation Mechanical Puzzle: Krystalledron (crystal version), not Rubik
Tags: education, reference, research, resources, science
This entry was posted on Thursday, August 27th, 2009 at 7:29 am and is filed under Math Books. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.
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