Citations
A brief description of the National Grid and reference system, 1946, GBR/3296/Maps/CCSA.IM_420_4, IM_420_4. Cambridge University Library. |
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A brief description of the National Grid and reference system, 1946, GBR/3296/Maps/CCSA.IM_420_4, IM_420_4. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/239286 Accessed November 14, 2024. |