Music and Meaning in Old Hispanic Lenten Chants: Psalmi, ...
Emma Hornby
19 Manuel Pedro Ferreira, Antologia de música em Portugal na Idade Média e no Renascimento, 2 vols. (Lisbon, 2008), 1:11, cites references, dated 959–1083, to the presence of Old Hispanic antiphonaries (that is, containing both Mass and ...