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Citations

Correspondence on magnetic instruments, 1937 - 1939, GBR/0180/RGO 8/9. Cambridge University Library.

Correspondence on magnetic instruments, 1937 - 1939, GBR/0180/RGO 8/9. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/99352 Accessed February 26, 2024.

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