Citations
Christian Siemers on a method using an instrument for observing polar altitudes, 1815 - 1817, GBR/0180/RGO 14/38: 328-336. Cambridge University Library. |
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Christian Siemers on a method using an instrument for observing polar altitudes, 1815 - 1817, GBR/0180/RGO 14/38: 328-336. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/110112 Accessed April 16, 2024. |