Tony Finch
dot@dotat.at
https://dotat.at/
https://dotat.at/:/FFZNB.html
2005-01-01T18:30:00Z
The "rattleback": a self-reversing spinning toy.
2005‑01‑01
The "rattleback": a self-reversing spinning toy.
http://www.globalspec.com/Newsletter/ViewIssue?vol=Vol3Issue15&pub=1&isPastIssue=1#Challenge
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