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Different numbering systems - cityhantam - 11-02-2022
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RE: Different numbering systems - cityhantam - 11-02-2022
10分钟学会写别人看不懂的数字! 你又能跟小伙伴炫耀了！ - 青少年科普 - 淮北市科学技术协会
http://www.hbkx.gov.cn/index.php?m=content&c=index&a=show&catid=16&id=1538
RE: Different numbering systems - cityhantam - 11-02-2022
What are Cistercian numbers -- the forgotten ciphers of Medieval monks
https://www.zmescience.com/science/cirstercian-numbers-90432432/