Citations
Consultative papers 1977 : OS 77/1 : Geodetic levelling investigations, 1977-01, GBR/3296/Maps/CCSA.IM_398_19, IM_398_19. Cambridge University Library. |
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Consultative papers 1977 : OS 77/1 : Geodetic levelling investigations, 1977-01, GBR/3296/Maps/CCSA.IM_398_19, IM_398_19. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/239116 Accessed May 15, 2025. |