Citations
Metrication of Ordnance Survey maps. Leaflet no 20, 1969-10, GBR/3296/Maps/CCSA.OS_150_4, OS_150_4. Cambridge University Library. |
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Metrication of Ordnance Survey maps. Leaflet no 20, 1969-10, GBR/3296/Maps/CCSA.OS_150_4, OS_150_4. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/243220 Accessed April 29, 2025. |