||Snow 1977, no. 238: "The text of what must have been a public address by the most erudite musical scholar working in this field. There is a satisfactory sketch of Alfonsine musical culture, even though limited by its modest intentions . Focusses on the popular dance melody and Gregorian chant while making a case for the entirely monodic nature of the music of the CSM, despite the earlier introduction of polyphony. Ends by cautiously suggesting that some internal evidence might help lay a foundation for demonstrating Alfonso's actual participation as a composer of some cantiga melodies."