Citations
1:50,000 working file : examples & flowlines [first and second series, 1974, GBR/3296/Maps/CCSA.OS_72_7, OS_72_7. Cambridge University Library. |
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1:50,000 working file : examples & flowlines [first and second series, 1974, GBR/3296/Maps/CCSA.OS_72_7, OS_72_7. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/242312 Accessed November 17, 2024. |