Citations
Thomas Johnstone on the change of the variations of the compass and discovery of the magnetic pole, 1822 - 1827, GBR/0180/RGO 14/43: 394-400. Cambridge University Library. |
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Thomas Johnstone on the change of the variations of the compass and discovery of the magnetic pole, 1822 - 1827, GBR/0180/RGO 14/43: 394-400. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/110220 Accessed April 25, 2024. |