Revision history for entry Prawitz, Dag (1965). "Natural Deduction: A Proof-Theoretical Study" [PRANDA]

NB: for privacy reasons, few details are provided in public revision histories.
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2014-03-24T21:22:19update
2014-03-17T07:34:53updateSystem / admin update -
2014-02-27T15:46:18updateSystem / admin update -
2009-01-25T12:45:37updateSystem / admin update -