1. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by David Ewing Duncan 
Price: USD 1.39
Dealer: Alibris, BookHolders via Alibris
Description: Harper Perennial 1999 Reprint Trade paperback Excellent [ No Hassle 30 Day Returns ] [ Edition: Reprint ] Publisher: Harper Perennial Pub Date: 6/1/1999 Binding: Paperback Pages: 328. 

2. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 1.48
Dealer: Alibris, Books For Life via Alibris
Description: Harper Perennial 1999 Softcover Book is in good condition. Minimal signs of wear. It May have markings or highlights but kept to only a few pages. May not come with supplemental materials if applicable. 

3. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by David Ewing Duncan 
Price: USD 1.87
Dealer: Abebooks, BookHolders
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: Harper Perennial] Softcover [ No Hassle 30 Day Returns ][ Ships Daily ] [ Underlining/Highlighting: NONE ] [ Writing: NONE ] [ Edition: Reprint ] Publisher: Harper Perennial Pub Date: 6/1/1999 Binding: Paperback Pages: 328 Reprint edition. [Towson, MD, U.S.A.] [Publication Year: 1999]  

4. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 1.98
Dealer: Alibris, Orion Tech via Alibris
Description: Harper Perennial 1999-06-01 paperback Good Size: 5x0x8; 

5. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 1.98
Dealer: Alibris, Gulf Coast Books via Alibris
Description: Harper Perennial 1999-06-01 Paperback Good Size: 5x0x8; 

6. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 2.14
Dealer: Alibris, ThriftBooks-Atlanta via Alibris
Description: Harper Perennial 1999 Softcover Good Pages can have notes/highlighting. Spine may show signs of wear. ~ ThriftBooks: Read More, Spend Less. 

7. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 2.14
Dealer: Alibris, ThriftBooks-Atlanta via Alibris
Description: Harper Perennial 1999 Softcover Good Former library book; Pages can have notes/highlighting. Spine may show signs of wear. ~ ThriftBooks: Read More, Spend Less. 

8. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 2.14
Dealer: Alibris, ThriftBooks-Reno via Alibris
Description: Harper Perennial 1999 Softcover Good Pages can have notes/highlighting. Spine may show signs of wear. ~ ThriftBooks: Read More, Spend Less. 

9. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 2.14
Dealer: Alibris, ThriftBooks-Reno via Alibris
Description: Harper Perennial 1999 Softcover Fair Readable copy. Pages may have considerable notes/highlighting. ~ ThriftBooks: Read More, Spend Less. 

10. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 2.14
Dealer: Alibris, ThriftBooks-Reno via Alibris
Description: Harper Perennial 1999 Softcover Good Pages can have notes/highlighting. Spine may show signs of wear. ~ ThriftBooks: Read More, Spend Less. 

11. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 2.14
Dealer: Alibris, ThriftBooks-Baltimore via Alibris
Description: Harper Perennial 1999 Softcover Good Pages can have notes/highlighting. Spine may show signs of wear. ~ ThriftBooks: Read More, Spend Less. 

12. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 2.16
Dealer: Alibris, Blue Vase Books via Alibris
Description: Harper Perennial 1999 Trade paperback Fair The item is very worn but continues to work perfectly. Signs of wear can include aesthetic issues such as scratches, dents, worn and creased covers, folded page corners and minor liquid stains. All pages and the cover are intact, but the dust cover may be missing. Pages may include moderate to heavy amount of notes and highlighting, but the text is not obscured or unreadable. Page edges may have foxing (age related spots and browning). May NOT include discs, access code or other supplemental materials. 

13. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by David Ewing Duncan 
Price: USD 2.44
Dealer: Biblio, BookHolders
Description: Excellent. [ No Hassle 30 Day Returns ][ Ships Daily ] [ Underlining/Highlighting: NONE ] [ Writing: None ] ISBN 0380793245 9780380793242 [US] 

14. Calendar Humanity's Epic Struggle to Determine a True and Accurate Year.
by Duncan David Ewing 
Price: USD 2.49
Dealer: Biblio, Eric Strattman
Description: Avon Books. Softcover. Good. 1998. Wear around the edges and at the corners of the covers. Inventory sticker on the spine. Pages are clean and appear to be mark free. Avon Books ISBN 0380793245 9780380793242 [US] 

15. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 3.00
Dealer: Alibris, HPB-Ruby via Alibris
Description: Harper Perennial 1999 paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

16. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 3.00
Dealer: Alibris, HPB-Ruby via Alibris
Description: Harper Perennial 1999 paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

17. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 3.00
Dealer: Alibris, HPB-Diamond via Alibris
Description: Harper Perennial 1999 paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

18. Calendar. Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 3.00
Dealer: Alibris, Boomers Books & Empire Models via Alibris
Description: Avon Books 1998 First Edition Softcover Very Good with No dust jacket as issued 0380793245. A crisp, clean, tightly bound softcover copy presenting light creasing to spine from having been previously gently read and presenting light shelf wear only. 

19. Calendar. Humanity's Epic Struggle to Determine a True and Accurate Year.
by Duncan David Ewing 
Price: USD 3.00
Dealer: Biblio, Boomer's Books
Description: Avon Books. Very Good with No dust jacket as issued. Date: 1998. First Edition. Softcover. 0380793245 . A crisp, clean, tightly bound softcover copy presenting light creasing to spine from having been previously gently read and presenting light shelf wear only. . 1998. Avon Books ISBN 0380793245 9780380793242 [US] 

20. Calendar
by David Ewing Duncan 
Price: USD 3.00
Dealer: Abebooks, Library House Internet Sales
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: Harper Perennial] Softcover The adventure spans the world from Stonehenge to astronomically aligned pyramids at Giza, from Mayan observatories at Chichen Itza to the atomic clock in Washington, the world's official timekeeper since the 1960s. We visit cultures from Vedic India and Cleopatra's Egypt to Byzantium and the Elizabethan court; and meet an impressive cast of historic personages from Julius Caesar to Omar Khayyam, and giants of science from Galileo and Copernicus to Stephen Hawking. Our present calendar system predates the invention of the telescope, the mechanical clock, and the concept ol zero and its development is one of the great untold stories of science and history. How did Pope Gregory set right a calendar which was in error by at least ten lull days? What did time mean to a farmer on the Rhine in 800 A.D.? What was daily life like in the Middle Ages, when the general population reckoned births and marriages by seasons, wars, kings'' reigns, and saints' days? In short, how did the world The adventure spans the world from Stonehenge to astronomically aligned pyramids at Giza, from Mayan observatories at Chichen Itza to the atomic clock in Washington, the world's official timekeeper since the 1960s. We visit cultures from Vedic India and Cleopatra's Egypt to Byzantium and the Elizabethan court; and meet an impressive cast of historic personages from Julius Caesar to Omar Khayyam, and giants of science from Galileo and Copernicus to Stephen Hawking. Our present calendar system predates the invention of the telescope, the mechanical clock, and the concept ol zero and its development is one of the great untold stories of science and history. How did Pope Gregory set right a calendar which was in error by at least ten lull days? What did time mean to a farmer on the Rhine in 800 A.D.? What was daily life like in the Middle Ages, when the general population reckoned births and marriages by seasons, wars, kings'' reigns, and saints' days? Solid binding. Please note the image in this listing is a stock photo and may not match the covers of the actual item. [Grand Rapids, OH, U.S.A.] [Publication Year: 1999]  

21. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 3.00
Dealer: Abebooks, HPB-Ruby
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: Harper Perennial] Softcover Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! [Dallas, TX, U.S.A.] [Publication Year: 1999]  

22. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 3.00
Dealer: Abebooks, HPB-Diamond
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: Harper Perennial] Softcover Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! [Dallas, TX, U.S.A.] [Publication Year: 1999]  

23. Calendar: : Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 3.42
Dealer: ZVAB, WorldofBooks
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: Harper Perennial] 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: 1999]  

24. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 3.50
Dealer: Alibris, HPB Inc. via Alibris
Description: Harper Perennial 1999 Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

25. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 3.50
Dealer: Alibris, HPB Inc. via Alibris
Description: Harper Perennial 1999 Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

26. Calendar: : Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 3.66
Dealer: AbebooksUK, WorldofBooks
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: Harper Perennial] 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: 1999]  

27. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan David Ewing 
Price: USD 3.99
Dealer: Biblio, St. Vinnie's Charitable Books
Description: Harper Perennial. Used - Acceptable. Paperback The item is fairly worn but still readable. Signs of wear include aesthetic issues such as scratches, worn covers, damaged binding. The item may have identifying markings on it or show other signs of previous use. May have page creases, creased spine, bent cover or markings inside. Packed with care, shipped promptly. Harper Perennial ISBN 0380793245 9780380793242 [US] 

28. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 3.99
Dealer: Abebooks, St Vincent de Paul of Lane County
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: Harper Perennial] Softcover Paperback The item is fairly worn but still readable. Signs of wear include aesthetic issues such as scratches, worn covers, damaged binding. The item may have identifying markings on it or show other signs of previous use. May have page creases, creased spine, bent cover or markings inside. Packed with care, shipped promptly. [Eugene, OR, U.S.A.] [Publication Year: 1999]  

29. Calendar
by David Ewing Duncan 
Price: USD 4.00
Dealer: Abebooks, Library House Internet Sales
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: Harper Perennial] Softcover The adventure spans the world from Stonehenge to astronomically aligned pyramids at Giza, from Mayan observatories at Chichen Itza to the atomic clock in Washington, the world's official timekeeper since the 1960s. We visit cultures from Vedic India and Cleopatra's Egypt to Byzantium and the Elizabethan court; and meet an impressive cast of historic personages from Julius Caesar to Omar Khayyam, and giants of science from Galileo and Copernicus to Stephen Hawking. Our present calendar system predates the invention of the telescope, the mechanical clock, and the concept ol zero and its development is one of the great untold stories of science and history. How did Pope Gregory set right a calendar which was in error by at least ten lull days? What did time mean to a farmer on the Rhine in 800 A.D.? What was daily life like in the Middle Ages, when the general population reckoned births and marriages by seasons, wars, kings'' reigns, and saints' days? In short, how did the world The adventure spans the world from Stonehenge to astronomically aligned pyramids at Giza, from Mayan observatories at Chichen Itza to the atomic clock in Washington, the world's official timekeeper since the 1960s. We visit cultures from Vedic India and Cleopatra's Egypt to Byzantium and the Elizabethan court; and meet an impressive cast of historic personages from Julius Caesar to Omar Khayyam, and giants of science from Galileo and Copernicus to Stephen Hawking. Our present calendar system predates the invention of the telescope, the mechanical clock, and the concept ol zero and its development is one of the great untold stories of science and history. How did Pope Gregory set right a calendar which was in error by at least ten lull days? What did time mean to a farmer on the Rhine in 800 A.D.? What was daily life like in the Middle Ages, when the general population reckoned births and marriages by seasons, wars, kings'' reigns, and saints' days? Due to age and/or environmental conditions, the pages of this book have darkened. Ex-Libris and is stamped as such. Please note the image in this listing is a stock photo and may not match the covers of the actual item. [Grand Rapids, OH, U.S.A.] [Publication Year: 1999]  

30. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 4.32
Dealer: Alibris, EBOOKSNORTHSHORE via Alibris
Description: Harper Perennial 1999-05-31 paperback Like New Size: 5x0x8; Excellent Trade PB: NO page markings, Very light page edge toning, Very Clean, Tight, NO spine creasing, Very light shelf edge wear, Very light corner wear. Choose Expedited or 2 day for faster delivery. 

31. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 4.45
Dealer: Alibris, Wonder Book - Member ABAA/ILAB via Alibris
Description: Harper Perennial 1999 Trade paperback Very Good Very Good condition. A copy that may have a few cosmetic defects. May also contain a few markings such as an owner's name, short gifter's inscription or light stamp. 

32. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 4.45
Dealer: Alibris, Wonder Book - Member ABAA/ILAB via Alibris
Description: Harper Perennial 1999 Trade paperback Good Good condition. With remainder mark. A copy that has been read but remains intact. May contain markings such as bookplates, stamps, limited notes and highlighting, or a few light stains. Bundled media such as CDs, DVDs, floppy disks or access codes may not be included. 

33. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 4.54
Dealer: Alibris, Half Price Books Inc via Alibris
Description: Harper Perennial 1999 paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

34. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 4.54
Dealer: Alibris, HPB Inc. via Alibris
Description: Harper Perennial 1999 Paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

35. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 4.54
Dealer: Abebooks, Half Price Books Inc.
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: Harper Perennial] Softcover Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! [Dallas, TX, U.S.A.] [Publication Year: 1999]  

36. Calendar Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan David Ewing 
Price: USD 4.90
Dealer: Biblio, Becker's Books
Description: Harper Perennial. Good with no dust jacket. Date: 1999. Paperback. 0380793245 . 7.799999992044 X 5.199999994696 X 0.899999999082 inches; 328 pages . 1999. Harper Perennial ISBN 0380793245 9780380793242 [US] 

37. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 4.99
Dealer: Alibris, St. Vinnie's Books via Alibris
Description: Harper Perennial 1999 Trade paperback Acceptable Paperback The item is fairly worn but still readable. Signs of wear include aesthetic issues such as scratches, worn covers, damaged binding. The item may have identifying markings on it or show other signs of previous use. May have page creases, creased spine, bent cover or markings inside. Packed with care, shipped promptly. 

38. Calendar: : Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan David Ewing 
Price: USD 5.00
Dealer: Biblio, Better World Books
Description: HarperCollins Publishers. Used - Good. Former library book; may include library markings. Used book that is in clean, average condition without any missing pages. HarperCollins Publishers ISBN 0380793245 9780380793242 [US] 

39. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan David Ewing 
Price: USD 5.10
Dealer: Biblio, Wonder Book
Description: Harper Perennial. Used - Good. Good condition. With remainder mark. A copy that has been read but remains intact. May contain markings such as bookplates, stamps, limited notes and highlighting, or a few light stains. Bundled media such as CDs, DVDs, floppy disks or access codes may not be included. Harper Perennial ISBN 0380793245 9780380793242 [US] 

40. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan David Ewing 
Price: USD 5.10
Dealer: Biblio, Wonder Book
Description: Harper Perennial. Used - Very Good. Very Good condition. A copy that may have a few cosmetic defects. May also contain a few markings such as an owner’s name, short gifter’s inscription or light stamp. Harper Perennial ISBN 0380793245 9780380793242 [US] 

41. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan David Ewing 
Price: USD 5.46
Dealer: Biblio, Orion LLC
Description: Harper Perennial, Date: 1999-06-01. paperback. Good. 5x0x8. 1999. Harper Perennial ISBN 0380793245 9780380793242 [US] 

42. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan David Ewing 
Price: USD 5.46
Dealer: Biblio, Gulf Coast Books
Description: Harper Perennial, Date: 1999-06-01. Paperback. Good. 5x0x8. 1999. Harper Perennial ISBN 0380793245 9780380793242 [US] 

43. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 5.48
Dealer: ZVAB, Wonder Book
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: Harper Perennial] Softcover Very Good condition. A copy that may have a few cosmetic defects. May also contain a few markings such as an owner's name, short gifter's inscription or light stamp. [Frederick, MD, U.S.A.] [Publication Year: 1999]  

44. Calendar: : Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 5.58
Dealer: ZVAB, Better World Books
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: HarperCollins Publishers] Softcover Used book that is in clean, average condition without any missing pages. [Mishawaka, IN, U.S.A.] [Publication Year: 1999]  

45. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 5.59
Dealer: Alibris, HPB-Emerald via Alibris
Description: Harper Perennial 1999 paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

46. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 5.59
Dealer: Alibris, Half Price Books Inc via Alibris
Description: Harper Perennial 1999 paperback Very good Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! 

47. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 5.59
Dealer: Abebooks, HPB-Emerald
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: Harper Perennial] Softcover Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority! [Dallas, TX, U.S.A.] [Publication Year: 1999]  

48. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 5.68
Dealer: Abebooks, Orion Tech
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: Harper Perennial] Softcover [Kingwood, TX, U.S.A.] [Publication Year: 1999]  

49. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 5.68
Dealer: Abebooks, Gulf Coast Books
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: Harper Perennial] Softcover [Memphis, TN, U.S.A.] [Publication Year: 1999]  

50. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
by Duncan, David Ewing 
Price: USD 5.69
Dealer: Abebooks, Wonder Book
Description: ISBN10: 0380793245, ISBN13: 9780380793242, [publisher: Harper Perennial] Softcover Very Good condition. A copy that may have a few cosmetic defects. May also contain a few markings such as an owner's name, short gifter's inscription or light stamp. [Frederick, MD, U.S.A.] [Publication Year: 1999]