Columbia subject headings:
Architecture--Italy--Ferrara--Guidebooks.
Art, Italian--Italy--Ferrara--Guidebooks.
Harvard subject headings:
Architecture--Italy--Ferrara--Guidebooks.
Art, Italian--Italy--Ferrara--Guidebooks.
Church architecture--Italy--Ferrara--Guidebooks.
Ferrara (Italy)--Buildings, structures, etc.
Princeton subject headings:
Architecture--Italy--Ferrara--Guidebooks.
Art, Italian--Italy--Ferrara--Guidebooks.