Citations
Master Files for 1:50,000 1st Series sheets. , 1971 - 1987, GBR/3296/Maps/CCSA.OS_50-72_3. Cambridge University Library. |
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Master Files for 1:50,000 1st Series sheets. , 1971 - 1987, GBR/3296/Maps/CCSA.OS_50-72_3. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/1483147 Accessed April 30, 2025. |