Columbia subject headings:
Local transit--New York (State)--New York--History--19th century.
Maps.
New York (N.Y.)--Maps.
Railroads--New York (State)--New York--History--19th century.
Railroads--New York (State)--New York--Maps.
Harvard subject headings:
Local transit--New York (State)--New York
Subways--New York (State)--New York
Princeton subject headings: