Citations
A brief description of the National Grid and reference system, 1946 - 1949, GBR/3296/Maps/CCSA.IM_420_5, IM_420_5. Cambridge University Library. |
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A brief description of the National Grid and reference system, 1946 - 1949, GBR/3296/Maps/CCSA.IM_420_5, IM_420_5. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/239287 Accessed May 15, 2025. |