Kitāb al-Adwār fī al-mūsīqá. كتاب الادوار في الموسيقى

Kislak Center for Special Collections, Rare Books and Manuscripts, LJS 235. 1500. Treatise on the theory of music, including division of frets, ratio of intervals, consonance and dissonance, cycles, rhythmic and melodic modes, and the 5-string oud or lute. Penn Libraries Catalog: go to Franklin