Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Civil Law
Author of work: Justinianus
Title: Digestum vetus
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Theology
Title: Theology
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Theology
Title: Theology
Subject: Philosophy
Author of work: Aristoteles
Title: De generatione et corruptione
Subject: Theology
Title: Theological commentary
Subject: Grammar
Author of work: Hugutio
Title: Magnae derivationes