Public domain
The Collection of Beads Arithmetic, 5 Volumes, Volume 1
From the collection of National Diet Library, Japan. Free to download, adapt and use — no permission needed.
Subjects
Credit line拾璣算法 5巻 第1冊. 明和6 [1769]. 有馬, 頼徸, 1712-1783. National Diet Library, Japan. Public domain.