Citations
Ordnance Survey : Short history of the Ordnance Survey, 1977-07, GBR/3296/Maps/CCSA.DA_610_1_21, DA_610_1_21. Cambridge University Library. |
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Ordnance Survey : Short history of the Ordnance Survey, 1977-07, GBR/3296/Maps/CCSA.DA_610_1_21, DA_610_1_21. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/246111 Accessed September 21, 2024. |