Citations
Conventional sign card Ordnance Survey scale 1:25,000 or about 2½ inches to 1 mile, 1960, GBR/3296/Maps/CCSA.OS_150_46, OS_150_46. Cambridge University Library. |
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Conventional sign card Ordnance Survey scale 1:25,000 or about 2½ inches to 1 mile, 1960, GBR/3296/Maps/CCSA.OS_150_46, OS_150_46. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/243279 Accessed April 29, 2025. |