Subject: Canon Law
Author of work: Gratianus
Title: Decretum Gratiani
Subject: Canon Law
Title: Treatise on canon law
Subject: Liturgy
Title: Breviarium cum notis
Subject: Liturgy
Title: Breviarium
Subject: Theology
Author of work: Gregorius I
Title: Dialogi
Subject: Canon Law
Title: Liber sextus decretalium
Subject: Canon Law
Title: Commentary on Decretals
Subject: Liturgy
Title: Breviarium cum notis
Subject: Law
Title: Registrum brevium
Subject: Canon Law
Title: Liber sextus decretalium