Columbia subject headings:
Harvard subject headings:
Alfonso X, King of Castile and Leon, 1221-1284. Primera crónica general.
Civilization, Medieval--13th century--Sources.
Spain--Historiography.
Princeton subject headings:
Alfonso X, King of Castile and Leon, 1221-1284. Primera crónica general.
Civilization, Medieval--13th century--Historiography.
Spain--Historiography.