Subject: Canon Law
Title: Treatise on canon law
Subject: Medicine
Title: Medicine
Subject: Theology
Title: Scholastic theology
Subject: Canon Law
Author of work: Gratianus
Title: Decretum Gratiani
Subject: Liturgy
Title: Graduale
Subject: Philosophy
Title: Questions on natural philosophy
Subject: Liturgy
Title: Horae
Subject: Liturgy
Title: Psalterium
Subject: Medicine
Title: Medicine