WITNESS

Risālah fī anwāʾ al-aʿdād wa-ṭarāʾif min al-aʿmāl mimmā jamaʿahu min mutaqaddimī ahl al-ʾilm bi-hādhihī al-ṣināʿah_Istanbul_Süleymaniye Manuscript Library_Ayasofya_4832