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

NB: for privacy reasons, few details are provided in public revision histories.
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2013-12-02T01:44:42updateSystem / admin update -
2013-01-12T20:54:33updateSystem / admin update -