Columbia subject headings:
Railroad law--Massachusetts.
Street-railroads law--Massachusetts.
Harvard subject headings:
Electric railroads--Law and legislation--Massachusetts.
Express service--Massachusetts.
Railroad law--Massachusetts.
Street-railroads--Law and legislation--Massachusetts.
Telegraph--Law and legislation--Massachusetts.
Telephone--Law and legislation--Massachusetts.
Transportation--Law and legislation--Massachusetts.
Princeton subject headings:
Electric railroads--Law and legislation--Massachusetts.
Express service--Massachusetts.
Railroad law--Massachusetts.
Street-railroads--Law and legislation--Massachusetts.
Telegraph--Law and legislation--Massachusetts.
Telephone--Law and legislation--Massachusetts.
Transportation--Law and legislation--Massachusetts.