Columbia subject headings:
Architecture--Spain--History.
Architecture--Spain--Zaragoza--History.
Art, Spanish--Spain--Zaragoza.
Art, Spanish.
Harvard subject headings:
Architecture--Spain--History.
Architecture--Spain--Zaragoza--History.
Art, Spanish--Spain--Zaragoza.
Art, Spanish.
Borrás Gualis, Gonzalo M., 1940-
Princeton subject headings:
Architecture--Spain--History.
Architecture--Spain--Zaragoza--History.
Art, Spanish--Spain--Zaragoza.
Art, Spanish.