Columbia subject headings:
Railroads--Italy--Tuscany--History--19th century.
Railroads--Italy--Tuscany--History--20th century.
Transportation--Italy--Tuscany--History--19th century.
Transportation--Italy--Tuscany--History--20th century.
Harvard subject headings:
Railroads--Italy--Italy--Tuscany--History--19th century.
Railroads--Italy--Italy--Tuscany--History--20th century.
Railroads--Italy--Tuscany--History--19th century.
Railroads--Italy--Tuscany--History--20th century.
Transportation--Italy--Tuscany--History--19th century.
Transportation--Italy--Tuscany--History--20th century.
Princeton subject headings: