Citations
Ordnance Survey policy statement no 49. Provision of minor planimetric control for large scale surveys at 1/1250 and 1/2500, 1956-10, GBR/3296/Maps/CCSA.OS_189_1/49/2, OS_189_1/49/2. Cambridge University Library. |
|
Ordnance Survey policy statement no 49. Provision of minor planimetric control for large scale surveys at 1/1250 and 1/2500, 1956-10, GBR/3296/Maps/CCSA.OS_189_1/49/2, OS_189_1/49/2. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/243613 Accessed April 28, 2025. |