Columbia subject headings:
Local transit--New York (State)--New York.
Subways--New York (State)--New York.
Harvard subject headings:
New York (N.Y.)--Politics and government--1898-1951
State-local relations--New York (State)--New York--History.
Subways--New York (State)--New York--History.
Urban transportation--New York (State)--New York--History.
Princeton subject headings: