Citations
'Royal Engineers Survey Service - Staff Manual', 1969, GBR/3296/Maps/CCSA.IM_565_18, IM_565_18. Cambridge University Library. |
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'Royal Engineers Survey Service - Staff Manual', 1969, GBR/3296/Maps/CCSA.IM_565_18, IM_565_18. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/240605 Accessed May 08, 2025. |