Citations
Charles Blackburn's rules for finding latitude at sea, 1824, GBR/0180/RGO 14/41: 41-48. Cambridge University Library. |
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Charles Blackburn's rules for finding latitude at sea, 1824, GBR/0180/RGO 14/41: 41-48. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/110176 Accessed November 25, 2024. |