Public domain
Comprehensive Study of Algorithms for Area Calculation, 5 vols., Vol. 5
From the collection of National Diet Library, Japan. Free to download, adapt and use — no permission needed.
Subjects
Credit line算法求積通考 : 5巻 第5冊. 天保15(1844). 長谷川, 弘, 1810-1887. National Diet Library, Japan. Public domain.