Revision history for entry Welty, Ivan: Frege on Indirect Proof [WELFOI]

NB: for privacy reasons, few details are provided in public revision histories.
TimeTypeNotes
2020-06-08T08:38:08update
2020-06-08T08:38:07update
2019-02-06T19:16:34updateSystem / admin update
2017-02-09T03:01:04updateSystem / admin update
2015-02-07T08:18:10updateSystem / admin update
2014-03-04T14:27:38updateSystem / admin update
2013-11-24T07:36:01updateSystem / admin update
2011-09-27T19:59:28updateSystem / admin update
2011-08-05T07:20:22updateSystem / admin update
2011-08-04T19:49:15addSystem / admin update