Juvenile delinquency (obscene and pornographic materials). [Part 1], May 24, 26, 31, June 9 and 18, 1955 : hearings before the Subcommittee to Investigate Juvenile Delinquency of the Committee on the Judiciary, United States Senate, Eighty-fourth Congress, first session pursuant to S. Res. 62, investigation of juvenile delinquency in the United States