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Citations

Measurements of needle inclination, 1855 - 1871, GBR/0180/RGO 15/180. Cambridge University Library.

Measurements of needle inclination, 1855 - 1871, GBR/0180/RGO 15/180. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/101549 Accessed January 28, 2023.

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