Columbia subject headings:
Federal aid to transportation--United States.
Railroads and state--United States.
Railroads--Freight--United States.
Railroads--United States--Branch lines.
Railroads--United States--Finance.
Harvard subject headings:
Federal aid to transportation--United States.
Railroads and state--United States.
Railroads--Freight--United States
Railroads--Freight--United States.
Railroads--United States--Branch lines.
Railroads--United States--Finance
Princeton subject headings:
Federal aid to transportation--United States.
Railroads and state--United States.
Railroads--Freight--United States.
Railroads--United States--Branch lines.
Railroads--United States--Finance.