Citations
Ordnance Survey policy statement no 7. Re-triangulation: density of minor trig., 1950-02, GBR/3296/Maps/CCSA.OS_189_1/7/1, OS_189_1/7/1. Cambridge University Library. |
|
Ordnance Survey policy statement no 7. Re-triangulation: density of minor trig., 1950-02, GBR/3296/Maps/CCSA.OS_189_1/7/1, OS_189_1/7/1. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/243550 Accessed November 18, 2024. |