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Citations

Correspondence on time balls and signals, 1870 - 1875, GBR/0180/RGO 6/617. Cambridge University Library.

Correspondence on time balls and signals, 1870 - 1875, GBR/0180/RGO 6/617. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/98809 Accessed February 28, 2024.

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