Public domain
Keicho Xuanming Calendar Calculation Methods, 6 volumes with 1 volume appendix
From the collection of National Diet Library, Japan. Free to download, adapt and use — no permission needed.
Subjects
Credit line長慶宣明暦算法 6巻付録1巻. 寛文3 [1663]. 安藤, 有益, 1624-1708. National Diet Library, Japan. Public domain.