Citations
Correspondence on time balls, 1879 - 1927, GBR/0180/RGO 8/147. Cambridge University Library. |
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Correspondence on time balls, 1879 - 1927, GBR/0180/RGO 8/147. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/99490 Accessed January 18, 2025. |