Citations
Ordnance Survey surveyors instructions. Module 1: superseded pages and amendments, 1977 - 1983, GBR/3296/Maps/CCSA.OS_151_4, OS_151_4. Cambridge University Library. |
|
Ordnance Survey surveyors instructions. Module 1: superseded pages and amendments, 1977 - 1983, GBR/3296/Maps/CCSA.OS_151_4, OS_151_4. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/243284 Accessed April 29, 2025. |