@Book{BVMC:639849, author = {Universidad de Valladolid. Biblioteca Universitaria}, title = {Codex Definitionu[m] Ac con[clusionu]m Universar[um] totius logicae [Manuscrito]}, url = {https://www.cervantesvirtual.com/obra/codex-definitionum-ac-conclusionum-universarum-totius-logicae-manuscrito} }