Hearings Before the Antitrust Subcommittee (Subcommittee No. 5) of the Committee on the Judiciary, House of Representatives, Eighty-sixth Congress, First Session, on H.R. 848, H.R. 927, H.R. 2788, H.R. 2868, and H.R. 4530, Bills to Amend Section 2(a) of the Clayton Act, as Amended by the Robinson-Patman Act, by Adding a New Proviso, June 25 and 26, 1959