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Citations

Kew Observatory sunspot observations, 1858 - 1897, GBR/0180/RGO 57. Cambridge University Library.

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 February 25, 2024.

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