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- Ijtihād (Islamic law)1
- Imaginary letters1
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- Imām al-Ḥaramayn al-Juwaynī, ʻAbd al-Malik ibn ʻAbd Allāh, 1028-1085. Burhān fī uṣūl al-fiqh1
- Imāmʹzādah, Muḥammad ibn Abī Bakr, 1097 or 1098-1177 or 1178. Shirʻat al-Islām1
- Intention--Religious aspects--Islam1
- Interpersonal relations--Religious aspects--Islam1
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- Iran--Kirmān1
- Iran--Tabrīz1
- Isbījābī, Aḥmad ibn Manṣūr, -approximately 1087. Sharḥ al-Mukhtaṣar fī al-fiqh1
- Islam and politics1
- Islam--Apologetic works1
- Islamic cosmology1
- Islamic poetry, Arabic1
- Islamic sermons, Arabic1