Subject: Liturgy
Title: Lectionarium
Subject: Liturgy
Title: Missale
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Liturgy
Title: Missale
Subject: Canon Law
Title: Commentary on Clementine Constitutions
Subject: Theology
Author of work: Ps. Clemens
Title: Recognitiones
Subject: Dictionary
Title: Dictionary
Subject: Philosophy
Author of work: Aristoteles
Title: Meteora