Citations
Ordnance Survey specimens of maps, 1971, GBR/3296/Maps/CCSA.OS_150_13/1, OS_150_13/1. Cambridge University Library. |
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Ordnance Survey specimens of maps, 1971, GBR/3296/Maps/CCSA.OS_150_13/1, OS_150_13/1. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/243230 Accessed April 29, 2025. |