1. Risālah-i Muʻīnīyah yā al-Mufīd dar hayʼat Creator: Ṭūsī, Naṣīr al-Dīn Muḥammad ibn Muḥammadطوسى، نصير الدين محمد بن محمد Contributor: Meyerhof, Max, former owner Date: [13-- or 14--?]. Language: Persian Geographic region: Africa, NorthMiddle EastSpainIslamic Empire Extent: 5 leaves : paper ; 202 x 153 (175 x 115) mm.