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	1.	Heinrich Johann Kessels : 1781-1849 : ein bedeutender Verfertiger von Chronometern und Präzisionsuhren : biographische Skizze und Werkverzeichnis / von Günther Oestmann. by Oestmann, Günther, 1959- [author.] Series: Acta historica astronomiae ; v. 44. Edition: 1. Auflage.[First edition]. Material type: Text; Format: print ; Nature of contents: ; Literary form: Not fiction Language: German, French, Dutch Publisher: Frankfurt : Verlag Harri Deutsch, 2011 Availability: Items available for loan: Jost Bürgi Library (1)Call number: TS544.8.K47 O37 2011. Add to cart (remove)
	2.	Marine- und Taschenchronometer : Geschichte, Entwicklung, Auswirkungen / Hans von Bertele. by Bertele, Hans von [author.] Material type: Text; Format: print ; Literary form: Not fiction Language: German Publisher: München : Callwey, 1981 Availability: Items available for loan: Jost Bürgi Library (1)Call number: QB107 .B39 1981. Add to cart (remove)
	3.	A quest for perfection : the life of John Gottlieb Ulrich, chronometer maker / Dee Helmore. by Helmore, Dee [author.] Edition: 2012 February Material type: Text; Format: print ; Nature of contents: ; Literary form: Not fiction Publisher: [Great Britain] : [publisher not identified], [2012] Availability: Items available for loan: Jost Bürgi Library (1)Call number: TS544.8.U57 H45 2012. Add to cart (remove)
	4.	Les chronomètres de marine / par E. Caspari. by Caspari, E. (Edouard), 1840-1919 [author.] Series: Encyclopédie scientifique des aide-mémoire Material type: Text; Format: print ; Literary form: Not fiction Publisher: Paris : Gauthier-Villars et fils : [between 1890 and 1900?]Publisher: G. Masson, [between 1890 and 1900?] Availability: Items available for loan: Jost Bürgi Library (1)Call number: QB107 .C37 1890x. Add to cart (remove)