Subject: Canon Law
Title: Treatise on canon law
Subject: Canon Law
Title: Liber sextus Decretalium
Subject: Theology
Author of work: Petrus Lombardus
Title: Sententiae
Subject: Biblica
Title: Biblia
Subject: Canon Law
Title: Canon law
Subject: Liturgy
Title: Graduale
Subject: Theology
Author of work: Thomas Aquinas
Title: Summa theologiae
Subject: Civil Law
Author of work: Justinianus
Title: Digestum vetus