1. Proofs and Refutations: The Logic of Mathematical Discovery
by LakatosWorrallZahar 
Price: USD 6.19
Dealer: ZVAB, WorldofBooks
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover The book has been read, but is in excellent condition. Pages are intact and not marred by notes or highlighting. The spine remains undamaged. [Goring-By-Sea, WS, United Kingdom] [Publication Year: 1976]  

2. Proofs and Refutations: The Logic of Mathematical Discovery
by LakatosWorrallZahar 
Price: USD 6.58
Dealer: AbebooksUK, WorldofBooks
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover The book has been read, but is in excellent condition. Pages are intact and not marred by notes or highlighting. The spine remains undamaged. [Goring-By-Sea, WS, United Kingdom] [Publication Year: 1976]  

3. Proofs and Refutations: The Logic of Mathematical Discovery
Price: USD 7.58
Dealer: Abebooks, HPB-Red
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] 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: 1976]  

4. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos/Worrall/Zahar 
Price: USD 8.14
Dealer: Biblio, S N Books Ltd
Description: Cambridge University Press, 12/01/Date: 2008 00:00:01. paperback. Very Good. 1.7986 in x 20.9841 in x 13.9894 in. 2008. Cambridge University Press ISBN 0521290384 9780521290388 [GB] 

5. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos/Worrall/Zahar 
Price: USD 8.43
Dealer: Biblio, World of Books Ltd
Description: Paperback. Good. ISBN 0521290384 9780521290388 [GB] 

6. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos/Worrall/Zahar 
Price: USD 8.43
Dealer: Biblio, World of Books Ltd
Description: Paperback. Very Good. ISBN 0521290384 9780521290388 [GB] 

7. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos/Worrall/Zahar 
Price: USD 8.51
Dealer: AbebooksUK, SN Books Ltd
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover Orders shipped daily from the UK. Professional seller. [Thetford, United Kingdom] [Publication Year: 2008]  

8. Proofs and Refutations : The Logic of Mathematical Discovery
Price: USD 9.23
Dealer: Biblio, Better World Books Ltd
Description: Cambridge University Press. Used - Good. Ships from the UK. Used book that is in clean, average condition without any missing pages. Cambridge University Press ISBN 0521290384 9780521290388 [GB] 

9. Proofs and Refutations : The Logic of Mathematical Discovery
Price: USD 9.23
Dealer: AbebooksUK, Better World Books Ltd
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover Ships from the UK. Used book that is in clean, average condition without any missing pages. [Dunfermline, United Kingdom] [Publication Year: 1976]  

10. Proofs and Refutations: the Logic of Mathematical Discovery
by Lakatos, Imre (Editor), and Worrall, John (Editor), and Zahar, Elie (Editor) 
Price: USD 9.71
Dealer: Alibris, HPB-Red via Alibris
Description: Cambridge University Press 1976 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! 

11. Proofs and Refutations: The Logic of Mathematical Discovery
Price: USD 9.76
Dealer: ZVAB, AwesomeBooks
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: -] Softcover Proofs and Refutations: The Logic of Mathematical Discovery This book is in very good condition and will be shipped within 24 hours of ordering. The cover may have some limited signs of wear but the pages are clean, intact and the spine remains undamaged. This book has clearly been well maintained and looked after thus far. Money back guarantee if you are not satisfied. See all our books here, order more than 1 book and get discounted shipping. [Wallingford, United Kingdom] [Publication Year: 1976]  

12. Proofs and Refutations: The Logic of Mathematical Discovery
Price: USD 10.37
Dealer: AbebooksUK, AwesomeBooks
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: -] Softcover Proofs and Refutations: The Logic of Mathematical Discovery This book is in very good condition and will be shipped within 24 hours of ordering. The cover may have some limited signs of wear but the pages are clean, intact and the spine remains undamaged. This book has clearly been well maintained and looked after thus far. Money back guarantee if you are not satisfied. See all our books here, order more than 1 book and get discounted shipping. [Wallingford, United Kingdom] [Publication Year: 1976]  

13. Proofs and Refutations: The Logic of Mathematical Discovery
Price: USD 10.37
Dealer: AbebooksUK, Bahamut Media
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: - -] Softcover This book is in very good condition and will be shipped within 24 hours of ordering. The cover may have some limited signs of wear but the pages are clean, intact and the spine remains undamaged. This book has clearly been well maintained and looked after thus far. Money back guarantee if you are not satisfied. See all our books here, order more than 1 book and get discounted shipping. [Reading, United Kingdom] [Publication Year: 1976]  

14. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos, Imre (Editor), and Worrall, John (Editor), and Zahar, Elie (Editor) 
Price: USD 12.95
Dealer: Alibris, Val Dusek via Alibris
Description: Cambridge Cambridge University Press 1976 Trade paperback Fine. read but pages pristine, unmarked Trade paperback (US). Glued binding. 188 p. Contains: Unspecified, Illustrations, black & white. Audience: General/trade. 

15. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos Imre; John Worrall and Elie Zahar eds. 
Price: USD 14.67
Dealer: Biblio, CARDINAL BOOKS ~~ ABAC/ILAB
Description: Cambridge: Cambridge University Press, Date: 1983. Book. Near Fine. Soft cover. 8vo - over 7¾ - 9¾" tall. Softcover. Owner's stamps. Otherwise clean, tight, and sharp. A sound and handsome copy, very neat. Bibliography, indexes.. 1983. Cambridge University Press ISBN 0521290384 9780521290388 [CA] 

16. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos, Imre; John Worrall and Elie Zahar [eds.] 
Price: USD 14.91
Dealer: Abebooks, CARDINAL BOOKS ~~ ABAC/ILAB
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press, Cambridge] Softcover Softcover. Owner's stamps. Otherwise clean, tight, and sharp. A sound and handsome copy, very neat. Bibliography, indexes. Size: 8vo - over 7¾ - 9¾" tall [London -- Birr, ON, Canada] [Publication Year: 1983]  

17. Proofs and Refutations: The Logic of Mathematical Discovery
Price: USD 15.98
Dealer: Abebooks, GF Books, Inc.
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover Book is in Used-VeryGood condition. Pages and cover are clean and intact. Used items may not include supplementary materials such as CDs or access codes. May show signs of minor shelf wear and contain very limited notes and highlighting. [Hawthorne, CA, U.S.A.] [Publication Year: 1976]  

18. Proofs and Refutations: the Logic of Mathematical Discovery
by Lakatos, Imre [Editor]; Worrall, John [Editor]; Zahar, Elie [Editor]; 
Price: USD 16.00
Dealer: Alibris, Calliopebooks via Alibris
Description: Cambridge University Press 1976-01-01 paperback Very Good++ Size: 5x0x8; Cambridge Univ Press. Fine/Like New and unread condition clean tight and bright. Spine is smooth and not creased cover is clean and bright. 

19. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos Imre Editor; Worrall John Editor; Zahar Elie Editor; 
Price: USD 16.00
Dealer: Biblio, Calliopebooks
Description: Cambridge University Press, Date: 1976-01-01. paperback. Very Good++. 5x0x8. Cambridge Univ Press. Fine/Like New and unread condition clean tight and bright. Spine is smooth and not creased cover is clean and bright. 1976. Cambridge University Press ISBN 0521290384 9780521290388 [US] 

20. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos, Imre [Editor]; Worrall, John [Editor]; Zahar, Elie [Editor]; 
Price: USD 16.00
Dealer: Abebooks, Calliopebooks
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover Cambridge Univ Press. Fine/Like New and unread condition clean tight and bright. Spine is smooth and not creased cover is clean and bright. [Potomac, MD, U.S.A.] [Publication Year: 1976]  

21. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos Imre 
Price: USD 16.24
Dealer: Biblio, Ergodebooks
Description: Brand: Cambridge University Press, Date: 1976-01-01. First Edition. paperback. Used: Good. 1976. Brand: Cambridge University Press ISBN 0521290384 9780521290388 [US] 

22. Proofs and Refutations: the Logic of Mathematical Discovery
by Lakatos, Imre (Editor), and Worrall, John (Editor), and Zahar, Elie (Editor) 
Price: USD 16.74
Dealer: Alibris, SurplusTextSeller via Alibris
Description: Cambridge University Press 1976 Trade paperback Good Ships in a BOX from Central Missouri! May not include working access code. Will not include dust jacket. Has used sticker(s) and some writing or highlighting. UPS shipping for most packages, (Priority Mail for AK/HI/APO/PO Boxes). 

23. Proofs and Refutations: The Logic of Mathematical Discovery
Price: USD 16.74
Dealer: Abebooks, Textbooks_Source
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover First Edition Ships in a BOX from Central Missouri! May not include working access code. Will not include dust jacket. Has used sticker(s) and some writing or highlighting. UPS shipping for most packages, (Priority Mail for AK/HI/APO/PO Boxes). [Columbia, MO, U.S.A.] [Publication Year: 1976]  

24. Proofs and Refutations : The Logic of Mathematical Discovery
Price: USD 17.20
Dealer: ZVAB, Better World Books
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover Used book that is in excellent condition. May show signs of wear or have minor defects. [Mishawaka, IN, U.S.A.] [Publication Year: 1976]  

25. Proofs and Refutations: The Logic of Mathematical Discovery
Price: USD 17.71
Dealer: Abebooks, Book Deals
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover Very Good condition. Shows only minor signs of wear, and very minimal markings inside (if any). [Tucson, AZ, U.S.A.] [Publication Year: 1976]  

26. Proofs and Refutations : The Logic of Mathematical Discovery
Price: USD 17.74
Dealer: Abebooks, Better World Books
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover Used book that is in excellent condition. May show signs of wear or have minor defects. [Mishawaka, IN, U.S.A.] [Publication Year: 1976]  

27. Proofs and Refutations : The Logic of Mathematical Discovery
Price: USD 18.55
Dealer: Biblio, Better World Books
Description: Cambridge University Press. Used - Good. Former library book; may include library markings. Used book that is in clean, average condition without any missing pages. Cambridge University Press ISBN 0521290384 9780521290388 [US] 

28. Proofs and Refutations: The Logic of Mathematical Discovery
Price: USD 21.65
Dealer: Abebooks, Irish Booksellers
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] 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: 1976]  

29. Proofs and Refutations: the Logic of Mathematical Discovery
by Lakatos, Imre; John Worrall And Elie Zahar [Eds. ] 
Price: USD 23.00
Dealer: Alibris, Cardinalis Books via Alibris
Description: Cambridge Cambridge University Press 1983 Soft cover Near Fine Book. 8vo-over 7¾-9¾" tall. Softcover. Owner's stamps. Otherwise clean, tight, and sharp. A sound and handsome copy, very neat. Bibliography, indexes. 

30. Proofs and Refutations: the Logic of Mathematical Discovery
by Lakatos, Imre [Editor]; Worrall, John [Editor]; Zahar, Elie [Editor]; 
Price: USD 23.00
Dealer: Alibris, h&hbooks24 via Alibris
Description: Cambridge University Press 1976 paperback Good Size: 5x0x8; 

31. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos, Imre 
Price: USD 24.88
Dealer: Abebooks, GoldenDragon
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover Very Good Copy. Fast Shipment [Houston, TX, U.S.A.] [Publication Year: 1976]  

32. Proofs and Refutations: The Logic of Mathematical Discovery
Price: USD 25.29
Dealer: Abebooks, GoldenWavesOfBooks
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover New. Fast Shipping and good customer service [Fayetteville, TX, U.S.A.] [Publication Year: 1976]  

33. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos, Imre 
Price: USD 26.62
Dealer: Abebooks, GoldBooks
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover New Copy. Customer Service Guaranteed [Denver, CO, U.S.A.] [Publication Year: 1976]  

34. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos, Imre (Editor), and Worrall, John (Editor), and Zahar, Elie (Editor) 
Price: USD 26.69
Dealer: Alibris, Pieuler LLC via Alibris
Description: Cambridge Cambridge University Press 1976 Trade paperback Good. Trade paperback (US). Glued binding. 188 p. Contains: Unspecified, Illustrations, black & white. 

35. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos, Imre 
Price: USD 26.74
Dealer: Abebooks, GoldBooks
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover Very Good Copy. Customer Service Guaranteed [Denver, CO, U.S.A.] [Publication Year: 1976]  

36. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos, Imre 
Price: USD 27.87
Dealer: Abebooks, GoldenDragon
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover Buy for Great customer experience [Houston, TX, U.S.A.] [Publication Year: 1976]  

37. Proofs and Refutations: The Logic of Mathematical Discovery.
by Lakatos, Imre: 
Price: USD 27.90
Dealer: ZVAB, Antiquariat Bernhardt
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover Zust: Gutes Exemplar. Mit Vorbesitzereintrag. XII, 174 Seiten, Englisch 230g [Kassel, Germany] [Publication Year: 1997]  

38. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos, Imre 
Price: USD 28.59
Dealer: Abebooks, Wizard Books
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover New [Long Beach, CA, U.S.A.] [Publication Year: 1976]  

39. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos, Imre 
Price: USD 28.79
Dealer: Abebooks, Books of the Smoky Mountains
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover Slightly Used Copy [Del Rio, TN, U.S.A.] [Publication Year: 1976]  

40. Proofs and Refutations by Imre Lakatos
by Imre Lakatos 
Price: USD 28.95
Dealer: Biblio, BooksEntirely
Description: This book is in very good condition and ready for quick shipment ISBN 0521290384 9780521290388 [US] 

41. Proofs and Refutations: The Logic of Mathematical Discovery.
by Lakatos, Imre: 
Price: USD 30.52
Dealer: AbebooksDE, Antiquariat Bernhardt
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover Zust: Gutes Exemplar. Mit Vorbesitzereintrag. XII, 174 Seiten, Englisch 230g [Kassel, Germany] [Publication Year: 1997]  

42. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos, Imre 
Price: USD 32.23
Dealer: Abebooks, Wizard Books
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover Used [Long Beach, CA, U.S.A.] [Publication Year: 1976]  

43. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos, Imre 
Price: USD 34.05
Dealer: Abebooks, Front Cover Books
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover [Denver, CO, U.S.A.] [Publication Year: 1976]  

44. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos Imre; Worrall John; Zahar Elie 
Price: USD 39.20
Dealer: Biblio, Pistil Books Online
Description: N Y: Cambridge University Press, Date: 1991. Trade Paperback. Near Fine. A clean, unmarked copy with a tight binding. 174 pages. 1991. Cambridge University Press ISBN 0521290384 9780521290388 [US] 

45. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos Imre 
Price: USD 39.61
Dealer: Biblio, Ergodebooks
Description: Brand: Cambridge University Press, Date: 1976-01-01. First Edition. paperback. Used:Good. 1976. Brand: Cambridge University Press ISBN 0521290384 9780521290388 [US] 

46. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos, Imre; Worrall, John; Zahar, Elie 
Price: USD 40.25
Dealer: Abebooks, Pistil Books Online, IOBA
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press, N Y] Softcover A clean, unmarked copy with a tight binding. 174 pages. [Seattle, WA, U.S.A.] [Publication Year: 1991]  

47. Proofs and Refutations: the Logic of Mathematical Discovery
by Lakatos, Imre; Worrall, John; Zahar, Elie 
Price: USD 41.25
Dealer: Alibris, Pistil Books Online via Alibris
Description: N Y Cambridge University Press 1991 Trade Paperback Near Fine A clean, unmarked copy with a tight binding. 174 pages. 

48. Proofs and Refutations : The Logic of Mathematical Discovery
Price: USD 44.99
Dealer: Biblio, Better World Books
Description: Cambridge University Press. Used - Very Good. Used book that is in excellent condition. May show signs of wear or have minor defects. Cambridge University Press ISBN 0521290384 9780521290388 [US] 

49. Proofs and Refutations: The Logic of Mathematical Discovery
by Lakatos, Imre 
Price: USD 55.81
Dealer: Abebooks, Hafa Adai Books
Description: ISBN10: 0521290384, ISBN13: 9780521290388, [publisher: Cambridge University Press] Softcover [Moncks Corner, SC, U.S.A.] [Publication Year: 1976]  

50. Proofs and Refutations: the Logic of Mathematical Discovery
by Lakatos, Imre (Editor), and Worrall, John (Editor), and Zahar, Elie (Editor) 
Price: USD 57.50
Dealer: Alibris, Chidoc5 Rare Books via Alibris
Description: Cambridge University Press 1976 Soft Cover New STORED NEW PRISTINE CONDITION SANITIZED THEN WRAPPED.