[Committee hearings] serials, 82d Congress. 12. Study of monopoly power, hearings before antitrust subcommittee, 82d Congress, 2d session, on resale price maintenance, H. R. 4365, H. R. 4592, H. R. 4602, and H. R. 6367 (H. R. 6925), Feb. 13-27, 1952.