Columbia subject headings:
Aragon (Spain)--History--Sources.
Harvard subject headings:
Aragon (Spain)--History--Alfonso I, 1104-1134.
Aragon (Spain)--History--Sources.
Princeton subject headings:
Aragon (Spain)--History--Alfonso I, 1104-1134--Sources.
Aragon (Spain)--History--Sources.
País Vasco (Spain)--History--Sources.