Revision history for entry Boolos, George (1980). "Provability, truth, and modal logic" [BOOPTA]

NB: for privacy reasons, few details are provided in public revision histories.
TimeTypeNotes
2013-11-22T11:22:13updateSystem / admin update -
2013-01-08T20:42:53updateSystem / admin update -
2013-01-08T20:42:53updateSystem / admin update -
2011-06-13T23:06:58update