Subject: Theology
Author of work: Gregorius I
Title: Moralia
Subject: Theology
Author of work: Petrus Lombardus
Title: Sententiae
Subject: Theology
Title: Comment. on Pauline epistles
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Philosophy
Title: Comment. on Aristotle
Subject: Philosophy
Title: Moral philosophy
Subject: Biblica
Title: Biblia
Subject: Canon Law
Title: Treatise on canon law
Subject: Theology
Author of work: Hieronymus
Title: In Prophetas Minores
Subject: Natural History
Title: On birds