Columbia subject headings:
Architecture--Spain--Calatayud--Guidebooks.
Art--Spain--Calatayud.
Calatayud (Spain)--Antiquities.
Harvard subject headings:
Architecture--Spain--Calatayud--Guidebooks.
Art--Spain--Calatayud--Guidebooks.
Calatayud (Spain)--Guidebooks.
Princeton subject headings: