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- How MetroCard works (2005) [pdf] https://events.ccc.de/congress/2005/fahrplan/attachments/594-paper_MagneticStripeTechnology2.pdf 12 comments
- New York City's MTA Exposed (2005) [pdf] https://events.ccc.de/congress/2005/fahrplan/attachments/594-paper_MagneticStripeTechnology2.pdf 19 comments
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