1. Risālah fī al-awqāt / taʾlīf Bishr ibn Sahl [sic] al-Isrāʾīlī. -- 1912. Creator: Sahl ibn Bishr al-Isrāʾīlī, fl. 822-850 Call Number: Arabic MSS 523 Image Count: 34 Found in: Beinecke Rare Book and Manuscript Library > Risālah fī al-awqāt / taʾlīf Bishr ibn Sahl [sic] al-Isrāʾīlī. -- 1912.