Revision history for entry Kalman, John A. (1978). "A shortest single axiom for the classical equivalential calculus" [JOHASS]

NB: for privacy reasons, few details are provided in public revision histories.
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2013-12-01T19:34:37updateSystem / admin update -
2013-11-22T13:36:38updateSystem / admin update -
2013-11-04T11:09:36updateSystem / admin update -
2010-10-28T13:43:15updateSystem / admin update -
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