Citations
'Approximate azimuth by simple methods', 1929, GBR/3296/Maps/CCSA.IM_510_12, IM_510_12. Cambridge University Library. |
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'Approximate azimuth by simple methods', 1929, GBR/3296/Maps/CCSA.IM_510_12, IM_510_12. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/240112 Accessed November 15, 2024. |