Columbia subject headings:
Harvard subject headings:
Harbors--Ticino River (Switzerland and Italy)
Inland navigation--Ticino River (Switzerland and Italy)--History.
Shipping--Ticino River (Switzerland and Italy)--History.
Ticino River (Switzerland and Italy)--Navigation--History.
Princeton subject headings:
Harbors--Ticino River (Switzerland and Italy).
Inland navigation--Ticino River (Switzerland and Italy)--History.
Shipping--Ticino River (Switzerland and Italy)--History.