WITNESS

Risālat al-Ṣābiʾī ilá Abī Sahl al-Kūhī yasʾaluhū al-naẓar fī shukūk ʿaraḍat lahu fī mā istaẖrajahū_Cairo_Dār al-kutub_Muṣṭafā Fāḍil riyāḍa_40