Columbia subject headings:
Zaragoza (Spain)
Zaragoza (Spain)--Economic conditions.
Zaragoza (Spain)--History.
Harvard subject headings:
Zaragoza (Spain)
Zaragoza (Spain)--Economic conditions.
Zaragoza (Spain)--History.
Princeton subject headings:
Zaragoza (Spain)--Economic conditions.
Zaragoza (Spain)--History.