Subject: Canon Law
Author of work: Gratianus
Title: Decretum Gratiani
Subject: Canon Law
Title: Commentary on Decretum Gratiani
Subject: Canon Law
Author of work: Innocentius IV
Title: In Decretales
Subject: Theology
Author of work: Ambrosius ps.
Title: De conflictu vitiorum et virtutum
Subject: Canon Law
Title: Commentary on Decretals