Citations
'Royal Observatory, Greenwich, In the Magnetic Ground', GBR/0180/RGO 116/5/9. Cambridge University Library. |
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'Royal Observatory, Greenwich, In the Magnetic Ground', GBR/0180/RGO 116/5/9. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/digital_objects/43329 Accessed November 16, 2024. |