Columbia subject headings:
Architecture, Domestic--Italy--Era River Valley--Guidebooks.
Country homes--Italy--Era River Valley--Guidebooks.
Era River Valley (Italy)--Guidebooks.
Harvard subject headings:
Architecture, Domestic--Italy--Era River Valley--Guidebooks.
Country homes--Italy--Era River Valley--Guidebooks.
Era River Valley (Italy)--Guidebooks.
Princeton subject headings:
Architecture, Domestic--Italy--Era River Valley--Guidebooks.
Country homes--Italy--Era River Valley--Guidebooks.
Era River Valley (Italy)--Description and travel--Guidebooks.
Guidebooks.