Joseph Dyer - The Scientia artis musice of Hélie Salomon, teaching music in the late thirteenth century ( Routledge ) 2018

https://pt.scribd.com/

https://www.pdfdrive.com/the-scientia-artis-musice-of-h%C3%A9lie-salomon-teaching-music-in-the-late-thirteenth-century-e183925715.html