Columbia subject headings:
Asturias (Spain)--Description and travel.
Leon (Kingdom)--Description and travel.
Harvard subject headings:
Asturias (Spain)--Description and travel.
Asturias (Spain)--History
León (Spain)--Description and travel.
León (Spain)--History.
Princeton subject headings:
Asturias (Spain)--Description and travel.
Leon (Kingdom)--Description and travel.