Lobby Investigation. Vol. 3 [microform] : hearings before the United States Senate Committee on the Judiciary, Subcommittee on S. Res. 20, Seventy-First Congress, second session, on Jan. 21-24, 28-30, Feb. 11-14, 19-21, 25-28, Mar. 4-6, 12-14, 18-21, 1930