Ramón Gonzálvez Ruiz Publications Hispania Vetus. Manuscritos litúrgico-musicales. De los orígenes visigóticos a la transición francorromana (siglos IX-XII) (2007)Hispania Vetus. Musical-Liturgical Manuscripts. From Visigothic Origins to the Franco-Roman Transition (9th-12th Centuries) (2007)