Book Anthony Turner; James Nye; Jonathan Betts (2022)
A General History of Horology. (/isis/citation/CBB050701589/) unapi

Book Rory McEvoy; Jonathan Betts (2020)
Harrison Decoded: Towards A Perfect Pendulum Clock. (/isis/citation/CBB018088141/) unapi

Book Jonathan Betts (2018)
Marine Chronometers at Greenwich: A Catalogue of Marine Chronometers at the National Maritime Museum, Greenwich. (/isis/citation/CBB472139775/) unapi

Article Hird, Jonathan; Betts, Jonathan; Pratt, Derek (2008)
The Diamond Pallets of John Harrison's Fourth Longitude Timekeeper---H4. Annals of Science: The History of Science and Technology (p. 171). (/isis/citation/CBB000774430/) unapi

Book Betts, Jonathan (2006)
Time Restored: The Harrison Timekeepers and R.T. Gould, the Man Who Knew (Almost) Everything. (/isis/citation/CBB000640775/) unapi

Article Hoskin, Michael; Betts, Jonathan (2004)
Alexander Herschel: The Forgotten Partner. Journal for the History of Astronomy (p. 387). (/isis/citation/CBB000773456/) unapi

Book Andrewes, William J.H. (1996)
The quest for longitude: The proceedings of the Longitude Symposium, Harvard University, Cambridge, Massachusetts, November 4-6, 1993. (/isis/citation/CBB000073160/) unapi

Article Betts, Jonathan (1993)
John Harrison: Inventor of the precision timekeeper. Endeavour: Review of the Progress of Science (pp. 160-167). (/isis/citation/CBB000037201/) unapi

Article Betts, Jonathan (1993)
The 18th-century transits of Venus, the voyages of Captain James Cook, and the early development of the marine chronometer. Antiquarian Horology and the Proceedings of the Antiquarian Horological Society (pp. 60-69). (/isis/citation/CBB000049685/) unapi