WITNESS

Jawāb ʿan kitāb Abī Isḥāq al-Ṣābiʾ ʿan al-ashkāl al-handasiyyah wa-marākiz al-thiqal wa-ghayrihi_Cairo_Dār al-kutub_Muṣṭafā Fāḍil riyāḍa_40