Citations
1:50,000 sheet 139 First Series negatives, in plastic envelope, 1973, GBR/3296/Maps/CCSA.OS_L4_1, OS_L4_1. Cambridge University Library. |
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1:50,000 sheet 139 First Series negatives, in plastic envelope, 1973, GBR/3296/Maps/CCSA.OS_L4_1, OS_L4_1. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/244937 Accessed April 25, 2025. |