Subversive Influence in the Dining Car and Railroad Food Workers Union : hearings before the Subcommittee To Investigate the Administration of the Internal Security Act and Other Internal Security Laws, Committee on the Judiciary, United States Senate, Eighty-Second Congress, first session, on Subversive Influence in the Dining Car and Railroad Food Workers Union, July 30, Aug. 6, 10, 20, Sept. 10, 14, 25, 1951