Books by Juan de Ortega:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Ortega, Juan de (O.P.): Tractado subtilissimo d[e] Arismetica y de Geometria (por Iua[n] Canalla, 1552), also by Francisco Guerra and Juan Canalla (page images at HathiTrust)- Ortega, Juan de (O.P.): Tratado subtilissimo de arismetica y de geometria (en casa d[e] Jacom Cro[m]berger, 1542), also by Francisco Guerra and Jacobo Cromberger (page images at HathiTrust)
- Ortega, Juan de (O.P.): Tratado subtilissimo de arismetica y de geometria (en casa de Jua[n] Cro[m]berger, 1537), also by Francisco Guerra and Juan Cromberger (page images at HathiTrust)
Find more by Juan de Ortega at your library, or elsewhere.