Citations
The use of plotting machings for 1/1250 air survey, 1955, GBR/3296/Maps/CCSA.IM_404_5, IM_404_5. Cambridge University Library. |
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The use of plotting machings for 1/1250 air survey, 1955, GBR/3296/Maps/CCSA.IM_404_5, IM_404_5. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/239193 Accessed May 15, 2025. |