Subject: Canon Law
Title: Liber sextus Decretalium
Subject: Regulae
Author of work: Augustinus
Title: Regula sancti Augustini
Subject: Theology
Author of work: Ps. Augustinus
Title: Sermones ad fratres in heremo
Subject: Liturgy
Title: Missale
Subject: Biblica
Title: Biblia
Subject: Science
Author of work: Alhasen
Title: Optica
Subject: Theology
Author of work: Gregorius I
Title: Moralia
Subject: Canon Law
Title: Commentary on Decretals
Subject: Canon Law
Title: Treatise on canon law
Subject: Biblica
Author of work: Hugo de S. Caro
Title: Postillae in Isaiam