Citations
Short history of the Ordnance Survey. Leaflet no 25, 1972-04, GBR/3296/Maps/CCSA.OS_150_14/25, OS_150_14/25. Cambridge University Library. |
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Short history of the Ordnance Survey. Leaflet no 25, 1972-04, GBR/3296/Maps/CCSA.OS_150_14/25, OS_150_14/25. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/243257 Accessed April 29, 2025. |