Columbia subject headings:
Interstate Rail Passenger Network Compact (U.S.)
Interstate agreements--United States.
Railroads--United States--Passenger traffic.
Harvard subject headings:
Interstate Rail Passenger Network Compact (U.S.)
Interstate agreements--United States.
Railroads--United States--Passenger traffic
Princeton subject headings:
Interstate Rail Passenger Network Compact (U.S.)
Interstate agreements--United States.
Railroads--United States--Passenger traffic.