Citations
Sunspot drawings of H.S. Schwabe, 1869 - 1880, GBR/0180/RGO 58. Cambridge University Library. |
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Sunspot drawings of H.S. Schwabe, 1869 - 1880, GBR/0180/RGO 58. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/97366 Accessed November 28, 2024. |