Columbia subject headings:
Harvard subject headings:
Castile (Spain)--History--Sources.
Castile (Spain)--History.
Crónica de veinte reyes.
Leon (Kingdom)--History.
Spain--History--711-1516--Sources.
Spain--History--711-1516.
Princeton subject headings:
Crónica de veinte reyes.
Spain--History, Military--Early works to 1800.
Spain--History--711-1516--Early works to 1800.
Spain--Kings and rulers--Early works to 1800.