Citations
Notes for candidates for technical examination. Geodetic control division, 1958-08, GBR/3296/Maps/CCSA.OS_410_29, OS_410_29. Cambridge University Library. |
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Notes for candidates for technical examination. Geodetic control division, 1958-08, GBR/3296/Maps/CCSA.OS_410_29, OS_410_29. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/244905 Accessed April 25, 2025. |