U. S. House of Representatives, Special Subcommittee on Intelligence of the Committee on Armed Services, 1974; U. S. Senate, Select Committee to Study Governmental Operations with Respect to Intelligence Activities, 1975, 1976; U. S. Senate Select Committee on Intelligence and the Subcommittee on Health and Scientific Research of the Committee on Human Resources, 1977; Rockefeller Commission Report to the President on CIA Activities within the U. S., 1975.