Subject: Canon Law
Title: Liber sextus Decretalium
Subject: Civil Law
Author of work: Justinianus
Title: Digestum
Subject: Civil Law
Title: Commentary on civil law
Subject: Liturgy
Title: Service book
Subject: Theology
Author of work: Augustinus
Title: In Genesim contra Manichaeos
Subject: Philosophy
Title: Comment. on Metaphysics
Subject: Philosophy
Title: Commentary on Ethics
Subject: Civil Law
Author of work: Justinianus
Title: Digestum vetus
Subject: Liturgy
Title: Graduale
Subject: Civil Law
Title: Comment. on Codex Justiniani