Citations
Correspondence with magnetic observatories, 1911 - 1932, GBR/0180/RGO 8/61. Cambridge University Library. |
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Correspondence with magnetic observatories, 1911 - 1932, GBR/0180/RGO 8/61. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/99404 Accessed April 22, 2025. |