Citations
John Gottlieb Ulrich's specification for the escapement of a marine chronometer, 1824 - 1829, GBR/0180/RGO 14/28. Cambridge University Library. |
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John Gottlieb Ulrich's specification for the escapement of a marine chronometer, 1824 - 1829, GBR/0180/RGO 14/28. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/101329 Accessed May 02, 2024. |