Citations
Primary triangulation of Great Britain figure 5 observation diagram, 1938, GBR/3296/Maps/CCSA.FJ_204_6/1, FJ_204_6/1. Cambridge University Library. |
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Primary triangulation of Great Britain figure 5 observation diagram, 1938, GBR/3296/Maps/CCSA.FJ_204_6/1, FJ_204_6/1. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/238831 Accessed May 15, 2025. |