Citations
Ordnance Survey surveyors instructions. Module 5 : instruments, 1976 - 1985, GBR/3296/Maps/CCSA.OS_151_1, OS_151_1. Cambridge University Library. |
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Ordnance Survey surveyors instructions. Module 5 : instruments, 1976 - 1985, GBR/3296/Maps/CCSA.OS_151_1, OS_151_1. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/243281 Accessed April 29, 2025. |