Columbia subject headings:
Harvard subject headings:
Alfonso X, King of Castile and Leon, 1221-1284--Criticism and interpretation.
Alfonso X, King of Castile and Leon, 1221-1284--Knowledge and learning.
Alfonso X, King of Castile and Leon, 1221-1284.
Castile (Spain)--Civilization.
Spain--Civilization--711-1516.
Spain--Intellectual life--711-1516.
Princeton subject headings:
Alfonso X, King of Castile and Leon, 1221-1284--Knowledge and learning.
Alfonso X, King of Castile and Leon, 1221-1284.
Spain--Intellectual life--711-1516.