Sifat al-safwa  [microform] / 
Ibn al-Jawzi. al-Sama' al-tabi'i / Aristotle ( Ar. Aristutalis) ; translated by As'ad ibn 'Ali ibn 'Uthman. Ma'rifat usul al-hadith / al-Hakim al-Nisaburi. al-Muhaddith al-fasil bayna al-rawi wa-al-wa'i / al-Ramhurmuzi 
<br/><br/><br/>Arabic manuscripts in the Uppsala University Library, Oriental Collections, Hellmut Ritter Microfilm Collection, Sweden.