Robuta

https://wbc.poznan.pl/dlibra/publication/314376?language=pl Ioannis de Sacrobosco [...] sphericu[m] opusculum, cum lucida et familiari expsitione [!] per... https://ilo.wikipedia.org/wiki/Sacrobosco?action=edit&redlink=1 Agparpartuat iti Sacrobosco - Wikipedia, ti nawaya nga ensiklopedia iti wikipedia nawaya nga ensiklopedia https://digi.ub.uni-heidelberg.de/diglit/bav_pal_lat_1452 Vatikan, Biblioteca Apostolica Vaticana, Pal. lat. 1452 Johannes de Sacrobosco; Johannes de... vatikan biblioteca apostolica pal lat