Subject: Liturgy
Title: Graduale (?)
Subject: Music
Title: Treatise on music
Subject: Science
Title: Questiones primi physicorum'
Subject: Liturgy
Title: Breviarium
Subject: Liturgy
Title: Psalmi (ex Breviario?)
Subject: Liturgy
Title: Processionale (?)
Subject: Liturgy
Title: Missale
Subject: Encyclopaedia
Author of work: Rabanus Maurus
Title: De natura rerum
Subject: Theology
Title: Theological commentary
Subject: Theology
Author of work: Petrus Comestor
Title: Historia scholastica