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