Revision history for entry Boolos, George (1980). "On systems of modal logic with provability interpretations" [BOOOSO]

NB: for privacy reasons, few details are provided in public revision histories.
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2015-02-04T17:40:35updateSystem / admin update -
2014-01-16T02:20:20updateSystem / admin update -
2011-06-13T18:07:13update
2011-05-31T09:46:45updateSystem / admin update -
2011-01-10T14:04:05updateSystem / admin update -
2010-10-12T19:01:04addSystem / admin update -