[1] [CITE[貴重資料:今井いたる文庫 | 国立天文台三鷹図書室]], [TIME[2023-05-18T06:29:31.000Z]], [TIME[2024-12-26T03:42:21.995Z]] <https://library.nao.ac.jp/kichou/imai.html>

-[634] 
[CITE@ja-JP[科学史研究 (40)]], [[日本科学史学会]], [TIME[1956-10]], [TIME[2024-11-28T09:48:19.000Z]], [TIME[2024-12-26T03:32:06.960Z]] <https://dl.ndl.go.jp/pid/2380288/1/20>
--[635] 
[CITE[奈良朝前後の暦日]], [[今井溱]]