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On Formally Undecidable Propositions of Principia Mathematica and Related Systems [Buy it!] | G?del, Kurt | USD 30.00 (Sat May 25 19:01:51 2024) | Abebooks | Front Cover Books | ISBN10: 0486669807, ISBN13: 9780486669809, [publisher: Dover Publications Inc. United States,] Softcover [Denver, CO, U.S.A.] [Publication Year: 1992] |