Subject: Liturgy
Title: Lectionarium
 
    
Subject: Liturgy
Title: Missale
 
    
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
 
    
Subject: Liturgy
Title: Graduale
 
    
Subject: Liturgy
Title: Missale
 
    
Subject: Canon Law
Title: Commentary on Clementine Constitutions
 
    
Subject: Liturgy
Title: Graduale
 
    
Subject: Dictionary
Title: Dictionary
 
    
Subject: Philosophy
Author of work: Aristoteles
Title: Meteora