Revision history for entry Burgess, J. A.; Humberstone, I. L. (1987). "Natural deduction rules for a logic of vagueness" [BURNDR]

NB: for privacy reasons, few details are provided in public revision histories.
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2014-04-08T03:08:17updateSystem / admin update -
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2011-03-19T22:32:56update
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2011-02-05T19:45:49update