Revision history for entry Pelletier, Francis Jeffry (1999). "A Brief History of Natural Deduction" [FRAABH]

NB: for privacy reasons, few details are provided in public revision histories.
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2014-03-28T09:50:37updateSystem / admin update -
2014-01-24T11:30:12updateSystem / admin update -
2013-11-24T07:35:31updateSystem / admin update -
2011-09-20T20:03:43updateSystem / admin update -
2011-01-21T03:56:46updateSystem / admin update -
2011-01-21T03:56:46updateSystem / admin update -
2010-10-02T17:59:38updateSystem / admin update -
2010-09-27T08:31:20update
2010-09-26T12:06:41update
2010-09-09T17:25:22addSystem / admin update -