. . . . . . "Considers testimony of four U.S. residents concerning their contacts with Soviet agents. Includes a brief synopsis of the hearings."@en . "Considers testimony of four U.S. residents concerning their contacts with Soviet agents. Includes a brief synopsis of the hearings." . . . "Conduct of espionage within the United States by agents of foreign Communist governments : hearings before the Committee on Un-American Activities, House of Representatives, Ninetieth Congress, first session" . . . . "Conduct of Espionage Within the U.S. by Agents of Foreign Communist Governments hearings before the United States House Committee on Un-American Activities, Ninetieth Congress, first session, on Apr. 6, 7, May 10, June 15, Nov. 15, 1967"@en . . . "Conduct of espionage within the United States by agents of foreign Communist governments Hearings, Ninetieth Congress, first session"@en . .