1. Harvard University, MS Arab 101 DS ID: DS11315 Title: Kitāb rasāʾil ʻilm al-uṣūl Author: Nūr al-Dīn al-Ḥusayn ibn al-Ḥasan ibn ʻAlī al-Shāfī al-ʻĀmilī Date: 319 [931 or 932