WITNESS

Risālah fī al-ʿamal bi-rubʿ al-muqanṭarāt_Cairo_Dār al-kutub_Dār al-kutub mīqāt_832

References

King, David. Fihris Al-maḫṭūṭāt Al-ʿilmiyyaẗ Al-maḥfūẓaẗ Bi-Dār Al-Kutub Al-Miṣriyyaẗ [A Catalogue of the Scientific Manuscripts in the Egyptian National Library]. 2 vol. Cairo: General Egyptian Book Organisation.

Vol. 2, pp. 433-34.