Subject: Canon Law
Title: treatise
 
    
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
 
    
Subject: Liturgy
Title: Psalterium
 
    
Subject: Liturgy
Title: Graduale
 
    
Subject: Grammar
Author of work: Johannes Balbus
Title: Catholicon
 
    
Title: [No title assigned]
 
    
Subject: History
Title: History (?)
 
    
Subject: Liturgy
Title: Missale
 
    
Subject: Civil Law
Author of work: Justinianus
Title: Institutiones Justiniani
 
    
Subject: Liturgy
Title: Antiphonale