Citations
Sheet size conversion table, 1960 - 1969, GBR/3296/Maps/CCSA.BWA_335_20, BWA_335_20. Cambridge University Library. |
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Sheet size conversion table, 1960 - 1969, GBR/3296/Maps/CCSA.BWA_335_20, BWA_335_20. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/235979 Accessed September 19, 2024. |