@Book{BVMC:625182, author = {Clavius, Christoph}, title = {Christophori Clauij Bambergensis e Societate Iesu, Epitome arithmeticae practicae}, url = {https://www.cervantesvirtual.com/obra/christophori-clauij-bambergensis-e-societate-iesu-epitome-arithmeticae-practicae} }