Title: Naṣīr al-Dīn al-Ṭūsī's Memoir on astronomy =
Subtitle: al-tadhkira fī ʻilm al-hayʼa
Subjects: Arab Astronomy, Astronomers, Early works to 1800, Biography
Places: Iran
People: Naṣīr al-Dīn Muḥammad ibn Muḥammad Ṭūsī (1201-1274)