Title: Kitāb rafʻ al-ḥijāb ʻan wujūh aʻmāl al-ḥisāb
Subjects: Arabic Manuscripts, Early works to 1800, Early works to 1900, Arithmetic, Arab Mathematics
Places: Washington (D.C.)
People: Aḥmad ibn Muḥammad Ibn al-Bannāʼ (1256?-1321?)