Citations
Ordnance Survey policy statement no 49. Provision of minor planimetric control for large scale surveys at 1/1250 and 1/2500, 1958-01, GBR/3296/Maps/CCSA.OS_189_1/49/3, OS_189_1/49/3. Cambridge University Library. |
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Ordnance Survey policy statement no 49. Provision of minor planimetric control for large scale surveys at 1/1250 and 1/2500, 1958-01, GBR/3296/Maps/CCSA.OS_189_1/49/3, OS_189_1/49/3. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/243614 Accessed April 28, 2025. |