Alfonso X of Castile, the learned king (1221-1284) :
Alfonso X of Castile, the learned king (1221-1284) : An International Symposium, Harvard University, 17 november 1984 / Edited by Francisco Márquez Villanueva and Carlos Alberto Vega - [Cambridge, Massachusetts (USA)] : Department of Romance Languages and Literatures of Harvard University, [1990] - V, 165 p. : front. (ilus.) ; 22½ cm - Harvard Studies in Romance Languages ; 43 .
ALFONSO X, EL SABIO. EY DE CASTILLA Y DE LEÓN. --HOMENAJE
CANTIGAS DE SANTA MARÍA (POEMA ESPAÑOLA).--CRÍTICA
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