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Citations

John George Hartley on an instrument for finding longitude, 1823, GBR/0180/RGO 14/38: 417-420. Cambridge University Library.

John George Hartley on an instrument for finding longitude, 1823, GBR/0180/RGO 14/38: 417-420. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/110124 Accessed June 23, 2024.

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