Revision history for entry Ursini, Aldo (1979). "A modal calculus analogous to k4w, based on intuitionistic propositional logic, iℴ" [URSAMC]

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2015-03-17T05:55:24updateSystem / admin update -
2015-02-06T00:07:57updateSystem / admin update -
2013-12-01T20:44:42updateSystem / admin update -
2013-01-12T15:54:33updateSystem / admin update -