Citations
'A brief description of the National Grid and reference system', 1945-11, GBR/3296/Maps/CCSA.IM_424_5, IM_424_5. Cambridge University Library. |
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'A brief description of the National Grid and reference system', 1945-11, GBR/3296/Maps/CCSA.IM_424_5, IM_424_5. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/239317 Accessed May 15, 2025. |