1. Penrose Tiles to Trapdoor Ciphers
by Gardner, Martin 
Price: USD 2.98
Dealer: Alibris, ThriftBooks-Reno via Alibris
Description: W.H. Freeman & Company 1989 Softcover Fair Readable copy. Pages may have considerable notes/highlighting. ~ ThriftBooks: Read More, Spend Less. 

2. Penrose Tiles to Trapdoor Ciphers
by Gardner, Martin 
Price: USD 2.98
Dealer: Alibris, ThriftBooks-Baltimore via Alibris
Description: W.H. Freeman & Company 1989 Softcover Good Pages can have notes/highlighting. Spine may show signs of wear. ~ ThriftBooks: Read More, Spend Less. 

3. From Penrose Tiles to Trapdoor Ciphers
by Gardner, Martin  
Price: USD 3.11
Dealer: AmazonUK, AmazonUK Marketplace
Description: Used - isbn: 0716719878 - isbn13: 9780716719878 W.H.Freeman & Co Ltd  

4. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 3.90
Dealer: Biblio, Books4Cause Inc.
Description: UsedGood. Clean copy. No major signs of wear save for light shelfwear on cover. ISBN 0716719878 9780716719878 [US] 

5. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 3.90
Dealer: Alibris, Solr Books via Alibris
Description: W.H. Freeman & Company 1989 Trade paperback Good Clean copy. No major signs of wear save for light shelfwear on cover. 

6. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 3.90
Dealer: Abebooks, Solr Books
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover Clean copy. No major signs of wear save for light shelfwear on cover. [Skokie, IL, U.S.A.] [Publication Year: 1989]  

7. From Penrose Tiles to Trapdoor Ciphers
by Gardner, Martin 
Price: USD 3.99
Dealer: AbebooksUK, BoundlessBookstore
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W.H.Freeman and Co Ltd] Softcover Good condition paperback with general wear. Contents are clean and bright with light spotting [Wallingford, United Kingdom] [Publication Year: 1989]  

8. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 5.00
Dealer: Alibris, HPB-Red via Alibris
Description: W H Freeman & Co 1988 Paperback Good Connecting readers with great books since 1972! Used textbooks may not include companion materials such as access codes, etc. May have some wear or writing/highlighting. We ship orders daily and Customer Service is our top priority! 

9. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 5.00
Dealer: Abebooks, HPB-Red
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover Connecting readers with great books since 1972! Used textbooks may not include companion materials such as access codes, etc. May have some wear or writing/highlighting. We ship orders daily and Customer Service is our top priority! [Dallas, TX, U.S.A.] [Publication Year: 1988]  

10. From Penrose Tiles to Trapdoor Ciphers
by Gardner, M. 
Price: USD 6.56
Dealer: ZVAB, Anybook.com
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W.H.Freeman & Co Ltd] Hardcover This is an ex-library book and may have the usual library/used-book markings inside.This book has hardback covers. Clean from markings. In fair condition, suitable as a study copy. No dust jacket. Please note the Image in this listing is a stock photo and may not match the covers of the actual item,700grams, ISBN:0716719878 [Lincoln, United Kingdom] [Publication Year: 1989]  

11. Penrose Tiles to Trapdoor Ciphers
by Gardner Martin 
Price: USD 6.83
Dealer: Biblio, ThriftBooks
Description: W.H. Freeman & Company, Date: 1989. Paperback. Acceptable. Readable copy. Pages may have considerable notes/highlighting. ~ ThriftBooks: Read More, Spend Less.Dust jacket quality is not guaranteed. 1989. W.H. Freeman & Company ISBN 0716719878 9780716719878 [US] 

12. From Penrose Tiles to Trapdoor Ciphers : Essays on Recreational Mathematics
by Martin Gardner 
Price: USD 6.83
Dealer: Biblio, ThriftBooks
Description: Worth Publishers, Incorporated, Date: 1988. Paperback. Good. Disclaimer:Pages can have notes/highlighting. Spine may show signs of wear. ~ ThriftBooks: Read More, Spend Less.Dust jacket quality is not guaranteed. 1988. Worth Publishers, Incorporated ISBN 0716719878 9780716719878 [US] 

13. From Penrose Tiles to Trapdoor Ciphers
by Gardner M. 
Price: USD 6.93
Dealer: Biblio, Anybook.com
Description: W.H.Freeman & Co Ltd, Date: 1989. This is an ex-library book and may have the usual library/used-book markings inside.This book has hardback covers. Clean from markings. In fair condition, suitable as a study copy. No dust jacket. Please note the Image in this listing is a stock photo and may not match the covers of the actual item,700grams, ISBN:0716719878 1989. W.H.Freeman & Co Ltd ISBN 0716719878 9780716719878 [GB] 

14. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 6.94
Dealer: Abebooks, -OnTimeBooks-
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover Book may contain some writing, highlighting, and or cover damage. Shipped fast and reliably! [Phoenix, AZ, U.S.A.] [Publication Year: 1989]  

15. Penrose Tiles to Trapdoor Ciphers
by Gardner, Martin 
Price: USD 6.98
Dealer: Abebooks, ThriftBooks-Atlanta
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W.H. Freeman & Company] Softcover Pages can have notes/highlighting. Spine may show signs of wear. ~ ThriftBooks: Read More, Spend Less 1.2 [AUSTELL, GA, U.S.A.] [Publication Year: 1989]  

16. Penrose Tiles to Trapdoor Ciphers
by Gardner, Martin 
Price: USD 6.98
Dealer: Abebooks, ThriftBooks-Dallas
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W.H. Freeman & Company] Softcover Readable copy. Pages may have considerable notes/highlighting. ~ ThriftBooks: Read More, Spend Less 1.2 [Dallas, TX, U.S.A.] [Publication Year: 1989]  

17. From Penrose Tiles to Trapdoor Ciphers
by Gardner, M. 
Price: USD 7.04
Dealer: AbebooksUK, Anybook.com
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W.H.Freeman & Co Ltd] Hardcover This is an ex-library book and may have the usual library/used-book markings inside.This book has hardback covers. Clean from markings. In fair condition, suitable as a study copy. No dust jacket. Please note the Image in this listing is a stock photo and may not match the covers of the actual item,700grams, ISBN:0716719878 [Lincoln, United Kingdom] [Publication Year: 1989]  

18. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 7.06
Dealer: ZVAB, Ammareal
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W.H.Freeman & Co Ltd] Softcover Petite(s) trace(s) de pliure sur la couverture. Légères traces d'usure sur la couverture. Edition 1989. Ammareal reverse jusqu'à 15% du prix net de cet article à des organisations caritatives. ENGLISH DESCRIPTION Book Condition: Used, Good. Slightly creased cover. Slight signs of wear on the cover. Edition 1989. Ammareal gives back up to 15% of this item's net price to charity organizations. [Morangis, France] [Publication Year: 1989]  

19. From Penrose Tiles to Trapdoor Ciphers
by Gardner, Martin 
Price: USD 7.67
Dealer: AbebooksUK, Heroes Akimbo Ltd T/A AproposBooks&Comics
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W.H.Freeman & Co Ltd] Softcover CREASES ON SLIGHTLY CONCAVE SPINE. VG [London, United Kingdom] [Publication Year: 1989]  

20. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 7.80
Dealer: AbebooksFR, Ammareal
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W.H.Freeman & Co Ltd] Softcover Petite(s) trace(s) de pliure sur la couverture. Légères traces d'usure sur la couverture. Edition 1989. Ammareal reverse jusqu'à 15% du prix net de cet article à des organisations caritatives. ENGLISH DESCRIPTION Book Condition: Used, Good. Slightly creased cover. Slight signs of wear on the cover. Edition 1989. Ammareal gives back up to 15% of this item's net price to charity organizations. [Morangis, France] [Publication Year: 1989]  

21. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 7.99
Dealer: Biblio, Miranda Books
Description: W H Freeman & Co. paperback. Very Good. 6x1x9. Very mild shelf wear. No writing, markings or highlighting found on inspection. W H Freeman & Co ISBN 0716719878 9780716719878 [US] 

22. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 7.99
Dealer: Alibris, Miranda Books via Alibris
Description: W H Freeman & Co 1989 paperback Very Good Size: 6x1x9; Very mild shelf wear. No writing, markings or highlighting found on inspection. 

23. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 7.99
Dealer: Abebooks, Miranda Books
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover Very mild shelf wear. No writing, markings or highlighting found on inspection. [Easthampton, MA, U.S.A.] [Publication Year: 1989]  

24. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 8.13
Dealer: Biblio, AMMAREAL
Description: W.H.Freeman & Co Ltd, Date: 1989. Paperback. Good. Slightly creased cover. Slight signs of wear on the cover. Edition 1989. Ammareal gives back up to 15% of this item's net price to charity organizations. 1989. W.H.Freeman & Co Ltd ISBN 0716719878 9780716719878 [FR] 

25. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 8.33
Dealer: Alibris, BookDrop via Alibris
Description: W H Freeman & Co 1989 Softcover Good 

26. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 8.66
Dealer: Abebooks, Books Unplugged
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover Buy with confidence! Book is in acceptable condition with wear to the pages, binding, and some marks within [Amherst, NY, U.S.A.] [Publication Year: 1989]  

27. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 8.72
Dealer: Abebooks, Books Unplugged
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover Buy with confidence! Book is in good condition with minor wear to the pages, binding, and minor marks within [Amherst, NY, U.S.A.] [Publication Year: 1989]  

28. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 9.09
Dealer: Biblio, Ergodebooks
Description: W H Freeman & Co (Sd), Date: 1988-10. Paperback. Used: Good. 1988. W H Freeman & Co (Sd) ISBN 0716719878 9780716719878 [US] 

29. Penrose Tiles to Trapdoor Ciphers
by Gardner Martin 
Price: USD 10.38
Dealer: Biblio, Ken Saunders
Description: New York: W.H. Freeman, Date: 1989. 0716719878. soft covers in fine condition . Charts. New York: soft covers in fine condition 1989 0716719878 1989. W.H. Freeman ISBN 0716719878 9780716719878 [CA] 

30. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 15.97
Dealer: Abebooks, Irish Booksellers
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover SHIPS FROM USA. Used books have different signs of use and do not include supplemental materials such as CDs, Dvds, Access Codes, charts or any other extra material. All used books might have various degrees of writing, highliting and wear and tear and possibly be an ex-library with the usual stickers and stamps. Dust Jackets are not guaranteed and when still present, they will have various degrees of tear and damage. All images are Stock Photos, not of the actual item. [Portland, ME, U.S.A.] [Publication Year: 1989]  

31. Penrose Tiles to Trapdoor Ciphers
by Gardner Martin 
Price: USD 16.00
Dealer: Biblio, Buckeye Bookshop Online
Description: New York: W. H. Freeman & Co., Date: 1989. Paperback. 1st paperback printing. 311 pp. Index. Fine condition (corners crisp, no creases, no markings). A clean, fresh copy. 1989. W. H. Freeman & Co. ISBN 0716719878 9780716719878 [US] 

32. Penrose Tiles to Trapdoor Ciphers
by Gardner, Martin 
Price: USD 16.00
Dealer: Alibris, Buckeye Bookshop Online via Alibris
Description: New York W. H. Freeman & Co 1989 Paperback 1st paperback printing. 311 pp. Index. Fine condition (corners crisp, no creases, no markings). A clean, fresh copy. 

33. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 17.15
Dealer: Biblio, SequiturBooks
Description: W H Freeman & Co, Date: 1988-10-01. Paperback. Like New. 9x6x1. Softcover. Good binding and cover. Clean, unmarked pages. 1988. W H Freeman & Co ISBN 0716719878 9780716719878 [US] 

34. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 17.50
Dealer: Alibris, Sequitur Books via Alibris
Description: W H Freeman & Co 1988-10-01 Paperback Like New Size: 9x6x1; Softcover. Good binding and cover. Clean, unmarked pages. 

35. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 17.50
Dealer: Abebooks, Sequitur Books
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover Softcover. Good binding and cover. Clean, unmarked pages. [Boonsboro, MD, U.S.A.] [Publication Year: 1988]  

36. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 21.90
Dealer: Abebooks, GoldenWavesOfBooks
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover New. Fast Shipping and good customer service [Fayetteville, TX, U.S.A.] [Publication Year: 1989]  

37. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 22.92
Dealer: Abebooks, LibraryMercantile
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover [Humble, TX, U.S.A.] [Publication Year: 1989]  

38. From Penrose Tiles to Trapdoor Ciphers
by Gardner, M. 
Price: USD 23.20
Dealer: Alibris, Anybook.com via Alibris
Description: W.H. Freeman & Co Ltd 1989 Paperback This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. Clean from markings. In fair condition, suitable as a study copy. No dust jacket. Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 700grams, ISBN: 0716719878. 

39. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 25.87
Dealer: Abebooks, GF Books, Inc.
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover Book is in NEW condition. [Hawthorne, CA, U.S.A.] [Publication Year: 1989]  

40. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 25.88
Dealer: Abebooks, Book Deals
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover New! This book is in the same immaculate condition as when it was published [Tucson, AZ, U.S.A.] [Publication Year: 1989]  

41. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 26.20
Dealer: Biblio, Ergodebooks
Description: W H Freeman & Co (Sd), Date: 1988-10-01. Paperback. Used:Good. 1988. W H Freeman & Co (Sd) ISBN 0716719878 9780716719878 [US] 

42. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 26.75
Dealer: Abebooks, GoldBooks
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover New Copy. Customer Service Guaranteed [Denver, CO, U.S.A.] [Publication Year: 1989]  

43. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 26.76
Dealer: Abebooks, Wizard Books
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover New [Long Beach, CA, U.S.A.] [Publication Year: 1989]  

44. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 27.42
Dealer: Abebooks, Grumpys Fine Books
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover Prompt service guaranteed. [Tijeras, NM, U.S.A.] [Publication Year: 1989]  

45. Penrose Tiles to Trapdoor Ciphers Gardner, Martin
by Martin Gardner 
Price: USD 27.62
Dealer: AbebooksFR, Les-Feuillets-du-Vidourle
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman & Co] Softcover [SAUVE, France] [Publication Year: 1989]  

46. Penrose tiles to trapdoor ciphers
by GARDNER, Martin 
Price: USD 27.70
Dealer: AbebooksUK, Cotswold Internet Books
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W.H.Freeman & Co Ltd] Softcover Tiny dent in edge of back cover & pages beneath, otherwise a clean, bright copy [Cheltenham, United Kingdom] [Publication Year: 1989]  

47. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 27.83
Dealer: Abebooks, Books of the Smoky Mountains
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman amp; Co] Softcover Slightly Used Copy [Del Rio, TN, U.S.A.] [Publication Year: 1989]  

48. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 28.58
Dealer: Abebooks, Front Cover Books
Description: ISBN10: 0716719878, ISBN13: 9780716719878, [publisher: W H Freeman amp; Co] Softcover [Denver, CO, U.S.A.] [Publication Year: 1989]  

49. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 29.50
Dealer: Alibris, Chidoc5 Rare Books via Alibris
Description: W H Freeman & Co 1989 Soft Cover New 

50. Penrose Tiles to Trapdoor Ciphers
by Martin Gardner 
Price: USD 30.00
Dealer: Biblio, CMSRAREBOOKS
Description: W H Freeman & Co, Date: 1989. Soft cover. New. 1989. W H Freeman & Co ISBN 0716719878 9780716719878 [US]