Citations
Kew Observatory sunspot observations, 1858 - 1897, GBR/0180/RGO 57. Cambridge University Library. |
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Kew Observatory sunspot observations, 1858 - 1897, GBR/0180/RGO 57. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/97365 Accessed April 18, 2024. |