Forever Undecided: Puzzle Guide to Godel (Oxford paperbacks)
by Raymond M. Smullyan
ISBN 13: 9780192821966
Format: Paperback (272 pages) Publisher: Oxford Paperbacks Published: 18 Aug 1988 Other Format: Paperback
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Forever Undecided: A Puzzle Guide to Godel
ISBN 13: 9780192801418
Format: Paperback (272 pages) Publisher: Oxford Paperbacks Published: 30 Nov 2000 Other Format: Paperback
Alice in Puzzle-Land: A Carrollian Tale for Children Under Eighty
ISBN 13: 9780486482002
Format: Paperback (192 pages) Publisher: Dover Publications Inc. Published: Feb 2012