Citations
Current limit of areas for basic survey at 6" scale, 1978-03, GBR/3296/Maps/CCSA.OS_L20_1, OS_L20_1. Cambridge University Library. |
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Current limit of areas for basic survey at 6" scale, 1978-03, GBR/3296/Maps/CCSA.OS_L20_1, OS_L20_1. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/244953 Accessed April 25, 2025. |