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Citations

Material on Harrison's timekeepers, 1931 - 1966, GBR/0180/RGO 74/1/9. Cambridge University Library.

Material on Harrison's timekeepers, 1931 - 1966, GBR/0180/RGO 74/1/9. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/146467 Accessed June 19, 2024.

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