Subject: History
Author of work: Ranulphus Higden
Title: Polychronicon
Subject: Canon Law
Author of work: Gratianus
Title: Decretum Gratiani
Subject: Epistolae
Author of work: Gregorius I
Title: Registrum
Subject: Philosophy
Author of work: Boethius
Title: Topica
Subject: Sermons
Title: Sermones
Subject: Philosophy
Title: Philosophy
Subject: Liturgy
Title: Missale
Subject: Civil Law
Author of work: Justinianus
Title: Digestum vetus
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Theology
Author of work: Thomas Aquinas
Title: Expositio primi libri Sententiarum