00699nam0-22002291i-450-990001138810403321000113881FED01000113881(Aleph)000113881FED01000113881--------d--------km-y0itay50------baeng<<The >>Unprovability of Consistency. An Essay in Modal Logicby Boolos G.Cambridge [etc.]Cambridge University Press1979Boolos,George45067ITUNINARICAUNIMARCBK99000113881040332110-L-219804MA1MA1Unprovability of Consistency. An Essay in Modal Logic344270UNINA