Columbia subject headings:
Harvard subject headings:
Art, Italian--Italy--Todi--Guidebooks.
Todi (Italy)--Guidebooks.
Todi (Italy)--History--Guidebooks.
Princeton subject headings:
Architecture--Italy--Todi--Guidebooks.
Art, Italian--Italy--Todi--Guidebooks.
Todi (Italy)--Buildings, structures, etc.--Guidebooks.