Citations
File cards on subjects including Ordnance Survey characteristic sheets and conventional signs, GBR/3296/Maps/CCSA.IM_426_17, IM_426_17. Cambridge University Library. |
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File cards on subjects including Ordnance Survey characteristic sheets and conventional signs, GBR/3296/Maps/CCSA.IM_426_17, IM_426_17. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/239365 Accessed November 14, 2024. |