Citations
Field revision diagrams one inch record sheets, 1964 - 1978, GBR/3296/Maps/CCSA.OS_L21_1, OS_L21_1. Cambridge University Library. |
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Field revision diagrams one inch record sheets, 1964 - 1978, GBR/3296/Maps/CCSA.OS_L21_1, OS_L21_1. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/244954 Accessed April 24, 2025. |