Revision history for entry Prior, A. N. (1958). "Peirce's axioms for propositional calculus" [PRIPAF]

NB: for privacy reasons, few details are provided in public revision histories.
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2013-11-22T06:49:04updateSystem / admin update -
2013-11-04T04:21:23updateSystem / admin update -
2012-01-08T14:42:16update
2010-12-26T02:39:45update