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Fashion is fleeting, Chalkdust regulars are not.
Crossnumber winners, Issue 16
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Dear Dirichlet, Issue 16
Girl guides, cooking, and public transport find their way into the prof's postbox this issue.
Crossnumber winners, issue 13
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Crossnumber winners, issue 10
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Christmas conundrum #2
Solve this and you could be the lucky winner of a signed copy of The Indisputable Existence of Santa Claus
