Columbia subject headings:
Harvard subject headings:
Brenner Pass (Austria and Italy)
Mountain railroads--Brenner Pass (Austria and Italy)--History--19th century.
Railroad tunnels--Brenner Pass (Austria and Italy)--History--19th century.
Railroad tunnels--Government policy--Austria--History--19th century.
Railroad tunnels--Government policy--Italy--History--19th century.
Princeton subject headings:
Brenner Pass (Austria and Italy)
Brenner Railway (Austria and Italy)
Mountain railroads--Austria.
Mountain railroads--Italy.
Railroad tunnels--Austria.
Railroads--Austria--Tyrol--History.
Tyrol (Austria)--Description and travel.