Columbia subject headings:
Architecture--Italy--Rome.
Historic buildings--Italy--Rome--Guidebooks.
Rome (Italy)--Buildings, structures, etc.
Rome (Italy)--Guidebooks.
Harvard subject headings:
Rome (Italy)--Guidebooks.
Princeton subject headings:
Architecture--Italy--Rome.
Guidebooks.
Historic buildings--Italy--Rome--Guidebooks.
Rome (Italy)--Buildings, structures, etc.
Rome (Italy)--Guidebooks.