Proposed Internal Security Act of 1968. 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, Ninetieth Congress, second session, on Mar. 13, 18, 19, 1968. Part 2 :

Continuation of hearings on S. 2988, to bring criminal action against persons visiting countries on the State Dept's restricted list, and/or giving aid and comfort to North Vietnam, and for other reasons causing internal security to be jeopardized.