'… contains a wealth of information for specialists and nonspecialists alike. Since this review can hardly do justice to it, readers are encouraged to find out for themselves just how useful this reference book can be and to appreciate the patience and sheer intellectual power that stand behind each chapter.' Kathleen Sewright, Notes
'This study both provides an essential resource for further study of the Old Hispanic rite and demonstrates its importance for musicologists, historians, liturgical scholars, and theologians.' William Flynn, Speculum: A Journal of Medieval Studies