Price Discrimination Legislation, 1965: Hearings Before the Subcommittee on Antitrust and Monopoly of the Committee on the Judiciary, United States Senate, Eighty-ninth Congress, First Session, Pursuant to S. Res. 40 on S. 995, to Amend the Clayton Act by Making Section 3 of the Robinson-Patman Act, with Amendments, a Part of the Clayton Act, in Order to Provide for Governmental and Private Civil Proceedings for Violations of Section 3 of the Robinson-Patman Act, June 21, 22, 23, and 30, 1965