al-Bayān wa al-tidhkār fī ṣanʻat ʻamal al-ghubār. البيان و التذكار في صنعة عمل الغبار

Kislak Center for Special Collections, Rare Books and Manuscripts, LJS 293. Baghdād, 1194. On calculation with integers and fractions; a copy of a work composed in the Maghrib; some marginal notations. Penn Libraries Catalog: go to Find