||Snow 1977, no. 217: "Overall a weak presentation. Alfonso as poet is the subject of ch. 6 (pp. 135-65) and as a musician, of ch. 7 (pp. 166-84). B. follows Valmar in making Alfonso a reader of Berceo as well as in most of the details of biography. The treatment of music is a disaster since less than a page is given over to the real point under discussion. The poetic texts are cited in French trans., to no useful end."