Title: Abū Naṣr al-Farrūkhī wa-urjūzatuhu fī al-ẓāʼ wa-al-ḍād
Subjects: Phonology, Early works to 1800, Ẓāʼ (The Arabic letter), Ḍād (The Arabic letter), Arabic language, Phonetics
People: Muḥammad ibn Aḥmad Awānī (d. 1161 or 2)