Espionage Activities of Personnel Attached to Embassies and Consulates Under Soviet Domination in the U.S : hearings before the United States Senate Committee on the Judiciary, Subcommittee To Investigate the Administration of the Internal Security Act and Other Internal Security Laws, Subcommittee Investigating Espionage Activities of Personnel Attached to Embassies and Consulates Under Soviet Domination in the U.S., Eighty-Second Congress, first session and Eighty-Second Congress, second session, on July 9, 1951, Feb. 5, 7, 1952.