Columbia subject headings:
Leon (Kingdom)--History.
Leon (Kingdom)--Politics and government.
Spain--History--711-1516.
Harvard subject headings:
Leon (Kingdom)--History--Alfonso III, 866-910.
Leon (Kingdom)--History.
Leon (Kingdom)--Politics and government.
Spain--History--711-1516.
Princeton subject headings:
Leon (Kingdom)--History--Alfonso III, 866-910.
Leon (Kingdom)--History.
Leon (Kingdom)--Politics and government.
Spain--History--711-1516.