Revision history for entry Johnson, Fred (1997). "Extended gergonne syllogisms" [JOHEGS]

NB: for privacy reasons, few details are provided in public revision histories.
TimeTypeNotes
2014-03-31T09:44:26updateSystem / admin update -
2013-11-22T11:24:13updateSystem / admin update -
2012-12-28T20:47:27updateSystem / admin update -
2012-12-28T20:47:27updateSystem / admin update -
2010-10-01T19:04:36updateSystem / admin update -