Subject: Canon Law
Author of work: Guido de Baysio
Title: Comment. in Sextum librum Decretalium
Subject: Canon Law
Author of work: Gratianus
Title: Decretum
Subject: Canon Law
Title: Liber sextus Decretalium
Subject: Philosophy
Author of work: Aristoteles
Title: Ethica
Subject: Canon Law
Title: Casus decretalium