Drug Industry Antitrust Act. Part 1, A.M.A. and medical authorities, July 5, 6, 18, 19, 20, 21, and 25, 1961 : hearings before the Subcommittee on Antitrust and Monopoly of the Committee on the Judiciary, United States Senate, Eighty-seventh Congress, first session pursuant to S. Res. 52 on S. 1552, a bill to amend and supplement the antitrust laws, with respect to the manufacture and distribution of drugs, and for other purposes