Citations
GSGS OR 1955 Great Britain diagram for conversion of the number prefixes of full national grid civil references into letter references of full national grid, military system references, and vice versa, 1950, GBR/3296/Maps/CCSA.OS_329_17, OS_329_17. Cambridge University Library. |
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GSGS OR 1955 Great Britain diagram for conversion of the number prefixes of full national grid civil references into letter references of full national grid, military system references, and vice versa, 1950, GBR/3296/Maps/CCSA.OS_329_17, OS_329_17. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/244415 Accessed April 29, 2025. |