Methadone use and abuse, 1972-73, hearings before Subcommittee to Investigate Juvenile Delinquency, 92d Congress, 2d session and 93d Congress, 1st session pursuant to S. Res. 256 and S. Res. 56, sec. 12, investigation of juvenile delinquency [and] investigative and legislative hearings on methadone use and abuse, S. 3846, S. 778 and S. 1115, Nov. 14-Apr. 5, 1973.

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