Citations
Consultative papers 1974 : OS 74/1 : Ordnance Survey tertiary levelling, 1974, GBR/3296/Maps/CCSA.IM_397_41, IM_397_41. Cambridge University Library. |
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Consultative papers 1974 : OS 74/1 : Ordnance Survey tertiary levelling, 1974, GBR/3296/Maps/CCSA.IM_397_41, IM_397_41. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/239075 Accessed May 15, 2025. |