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- Jāmiʻ al-Muẓaffarī (Damascus, Syria)1
- Jāmiʻ al-ṣaḥīḥ (Muslim ibn al-Ḥajjāj al-Qushayrī)1
- Jārbardī, Fakhr al-Dīn Aḥmad ibn al-Ḥasan, d. 1345. Mughnī fī ʻilm al-naḥw1
- Karaites--Liturgy1
- Khalwatīyah1
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- Kiddush1
- Kings and rulers--Genealogy1
- Kitāb (Sībawayh, ʻAmr ibn ʻUthmān)1
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- Land value taxation1
- Landowners1
- Language and languages--Philosophy1