Citations
Ordnance Survey instructions to field revisers & draftsmen for the revision and preparation of the small scale maps for reproduction by heliozincography 1924, 1924, GBR/3296/Maps/CCSA.OS_150_16, OS_150_16. Cambridge University Library. |
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Ordnance Survey instructions to field revisers & draftsmen for the revision and preparation of the small scale maps for reproduction by heliozincography 1924, 1924, GBR/3296/Maps/CCSA.OS_150_16, OS_150_16. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/243274 Accessed April 29, 2025. |