Kitāb al-ʿamal bi-'l-asṭurlāb - ʿAbd-ar-Raḥmān aṣ-Ṣūfī, Ibn-ʿUmar 903-986 (Maṭbaʿat Maǧlis Dāʾirat al-Maʿārif al-ʿUṯmānīya, 1962)