Citations
Correspondence on photographic magnitude, 1909 - 1912, GBR/0180/RGO 7/218. Cambridge University Library. |
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Correspondence on photographic magnitude, 1909 - 1912, GBR/0180/RGO 7/218. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/99260 Accessed November 29, 2024. |