Columbia subject headings:
Electric railroads.
Street-railroads--Colorado--Denver.
Street-railroads--New Jersey.
Harvard subject headings:
Electric railroads--Law and legislation--United States.
Electric railroads.
Street-railroads--Colorado--Denver.
Street-railroads--Law and legislation--United States.
Street-railroads--New Jersey.
Princeton subject headings:
Electric railroads.
Street-railroads--Colorado--Denver.
Street-railroads--New Jersey.