WITNESS

Maqālah fī tazyīf muqaddimāt maqālah Abī Sahl al-Kūhī fī anna nisbat al-quṭr ilá al-muḥīṭ nisbat al-wāḥid ilá thalāthah wa-tusʿ_Istanbul_Süleymaniye Manuscript Library_Ayasofya_4830

References

Pp. 289-94.