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Citations

Letter from Friedrich Robert Helmert to Sir George Howard Darwin; written at Potsdam, 1903-10-13, GBR/0012/MS DAR 251: 5132. Cambridge University Library.

Letter from Friedrich Robert Helmert to Sir George Howard Darwin; written at Potsdam, 1903-10-13, GBR/0012/MS DAR 251: 5132. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/798233 Accessed October 09, 2024.

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