- Reasoning1
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- Religious life1
- Revelation--Islam1
- Riddles1
- Riddles, Turkish1
- Riz̤ā-ʼi ʻAbbāsī, Āqā, approximately 1570-1635?1
- Rodents--Religious aspects--Islam1
- Romania1
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- Russia (Federation)--Tarki1
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- Rāfiʻī, ʻAbd al-Karīm ibn Muḥammad, 1162-1226. Muḥarrar1
- Rāgamālā painting1
- Rāzī, Fakhr al-Dīn Muḥammad ibn ʻUmar, 1149 or 1150-1210. Lubāb al-Ishārāt1
- Sabzavārī, Hādī ibn Mahdī, 1797 or 1798- Nibrās al-hudá1
- Sajāwandī, Sirāj al-Dīn Muḥammad ibn Muḥammad, active 12th century. Waqf wa-al-ibtidāʼ1