Citations
1:50 000 First / Second Series map conventional signs, 1979, GBR/3296/Maps/CCSA.OS_381_123, OS_381_123. Cambridge University Library. |
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1:50 000 First / Second Series map conventional signs, 1979, GBR/3296/Maps/CCSA.OS_381_123, OS_381_123. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/244800 Accessed April 25, 2025. |