Hearings Before the Subcommittee to Investigate Juvenile Delinquency..., 92-2 and 93-1, Pursuant to S. Res. 256 and S. Res. 56, Seciton 12, S. 3148 an DS. 821..., May 15, 16, and June 27, 28, 1972; February 22, March 26, 27, and June 26, 27, 1973