Citations
Small metal abacus, 1983, GBR/1928/NRI/NRI2/8/3/2/1, Box NRI2/8/3/2/1-7. Needham Research Institute. |
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Small metal abacus, 1983, GBR/1928/NRI/NRI2/8/3/2/1, Box NRI2/8/3/2/1-7. Needham Research Institute. https://archivesearch.lib.cam.ac.uk/repositories/21/archival_objects/503162 Accessed January 14, 2025. |