Columbia subject headings:
American Telephone and Telegraph Company.
Corporate divestiture--United States.
Telecommunication--Law and legislation--United States.
Telephone--Law and legislation--United States.
Harvard subject headings:
American Telephone and Telegraph Company.
Corporate divestiture--United States.
Telecommunication--Law and legislation--United States
Telephone--Law and legislation--United States
Princeton subject headings:
American Telephone and Telegraph Company.
Monopolies--United States.
Monopolistic competition--United States.
Telecommunication policy--United States.