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

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2015-02-05T02:11:31updateSystem / admin update -
2014-03-24T17:22:19update
2014-03-17T03:34:53updateSystem / admin update -
2014-02-27T10:46:18updateSystem / admin update -
2009-01-25T07:45:37updateSystem / admin update -