Columbia subject headings:
Antitrust law--United States.
Labor unions--United States.
Monopolies--United States.
Restraint of trade--United States.
Harvard subject headings:
Antitrust law--United States
Corporation law--United States.
Labor unions--United States
Monopolies--United States.
Restraint of trade--United States.
Princeton subject headings:
Labor unions--United States.
Monopolies--United States.
Restraint of trade--United States.
Trusts, Industrial--United States--Law.