Citations
Ordnance Survey surveyors instructions. Module amendments : superseded pages to 1987, 1978 - 1990, GBR/3296/Maps/CCSA.OS_151_3, OS_151_3. Cambridge University Library. |
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Ordnance Survey surveyors instructions. Module amendments : superseded pages to 1987, 1978 - 1990, GBR/3296/Maps/CCSA.OS_151_3, OS_151_3. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/243283 Accessed April 29, 2025. |