Citations
Ordnance Survey policy statement no 7. Re-triangulation: density of minor trig., 1955-11, GBR/3296/Maps/CCSA.OS_189_1/7/2, OS_189_1/7/2. Cambridge University Library. |
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Ordnance Survey policy statement no 7. Re-triangulation: density of minor trig., 1955-11, GBR/3296/Maps/CCSA.OS_189_1/7/2, OS_189_1/7/2. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/243551 Accessed November 18, 2024. |