S 3148, S. 3443, S. 3521, and S. 3555, Legislative proposals to extend or terminate Juvenile delinquency prevention and control act of 1968, Juvenile delinquency, hearing before Subcommittee to Investigate Juvenile Delinquency, 92d Congress, 2d session pursuant to S. Res. 256, sec. 12, Apr. 28, 1972.