Citations
The levelling handbook, second edition , 1972, GBR/3296/Maps/CCSA.OS_142_4, OS_142_4. Cambridge University Library. |
|
The levelling handbook, second edition , 1972, GBR/3296/Maps/CCSA.OS_142_4, OS_142_4. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/243075 Accessed April 30, 2025. |