Columbia subject headings:
Harvard subject headings:
Apennines (Italy)--History.
Romagna (Italy)--History.
Tuscany (Italy)--History.
Princeton subject headings:
Apennines (Italy)--History, Local.
Roads--Italy--Apennines--History.
Roads--Italy--Romagna--History.
Roads--Italy--Tuscany--History.
Romagna (Italy)--History, Local.
Tuscany (Italy)--History, Local.