Logiweb bibliography of propositional calculus

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[0] propositional calculus

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The pyk compiler, version 0.grue.20050603 by Klaus Grue GRD-2005-06-06.UTC:10:04:56.802958 = MJD-53527.TAI:10:05:28.802958 = LGT-4624769128802958e-6