Folio Ar and 21v from the “De pratica seu arte tripudii” manuscript, Bibliothèque nationale de France, gallica.bnf.fr
guilielmus_hebraeus_pisauriensis_de_pratica_-_btv1b105278918
Folio Ar and 21v from the “De pratica seu arte tripudii” manuscript, Bibliothèque nationale de France, gallica.bnf.fr