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Summary
Description全圖簡明算法指掌六粒烏算盤.png
中文:萬國書局《全圖簡明算法指掌》用圖
Date
in the early years of the 20th century
Source
goods.ruten.com.tw/item/show?21733949540726
Author
萬國書局
Licensing
Public domainPublic domainfalsefalse
This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.