Wiretapping : hearings before Subcommittee No. 5 of the Committee on the Judiciary, House of Representatives, Eighty-fourth Congress, first session on H.R. 762, to authorize the admission into evidence in certain criminal proceedings of information intercepted in national security investigations, and for other purposes : H.R. 867, to authorize the admission into evidence in certain criminal proceedings of information intercepted in national security investigations, and for other purposes : H.R. 4513, to prohibit wiretapping except by a court-authorized federal officer engaged in the investigation of crimes against the security of the United States : H.R. 4728, making unauthorized wiretapping a criminal offense : H.R. 5096, to authorize the admission into evidence in certain criminal proceedings of information intercepted in national security investigations, and for other purposes, March 23, 29, 30, April 19, 21, 26, 27, 28, Mary 3, 4, 9, and June 1, 1955.