US Department of Justice
Us Department of Justice: Antitrust Enforcement and the Consumer [Pdf]
This article outlines how the Antitrust Division of the Department Of Justice works for and protects the typical American consumer.
Thomson Reuters
Find Law: u.s. Constitution: Schechter Poultry Corporation v. United States (1953)
This resource contains the full text of the opinion delivered by Chief Justice Hughes of the Supreme Court. This case was about unfair competition.
Other
Gongol.com: Clayton Anti Trust Act
Brian Gongol has posted an excellent essay describing and analyzing the Clayton Anti-Trust Act.