Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Civil Law
Author of work: Justinianus
Title: Codex Justiniani
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Canon Law
Title: Commentary on Decretals
Subject: Theology
Title: Theological propositions
Subject: Liturgy
Title: Graduale
Subject: Biblica
Author of work: Petrus Lombardus
Title: Glossa in Epistolas Pauli
Subject: Sermons
Title: Sermones
Subject: Logic
Title: Logic
Subject: Science
Author of work: Alhasen
Title: Optica