Risālah fī al-dawāʼir allatī taḥuddu al-sāʻāt al-zamānīyah. [Transcribed from MS. Thurston 3, f. 126v l. xviii - f. 128r l. xxii.]

Author(s):

• Ibn ʻIrāq, Manṣūr ibn ʻAlī d. ca. 1034

Manuscripts:

• MS. Marsh 720 (Bodleian Library, Oxford University)
• MS. Thurston 3 (Bodleian Library, Oxford University)

The above references reflect only the current coverage of the online catalogue and may not be comprehensive.