Columbia subject headings:
American Telephone and Telegraph Company.
Antitrust law--United States.
Telecommunication equipment industry--Law and legislation--United States.
Harvard subject headings:
American Telephone and Telegraph Company.
Antitrust law--United States
Telecommunication equipment industry--Law and legislation--United States.
Princeton subject headings:
American Telephone and Telegraph Company--Trials, litigation, etc.
Antitrust law--United States.
Telecommunication equipment industry--Law and legislation--United States.
Telecommunication--Law and legislation--United States.