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Seniff, Dennis P.
Alfonso X and the Literary Histories of Ticknor and Amador de los Ríos
RQ 33 (1986), 355-64.
Snow 2007: "On pp. 358-59 [for Ticknor] and 361-62 [for Amador], brief notices of their respsective views on Alfonso's poetry. See also  and ."