title: [Law No. 4 (approved 23 June 1971 and subsequently emended)].
mesh_terms: D004335:Drug and Narcotic Control / Q000331:legislation & jurisprudence*; D011647:Puerto Rico
vernacular_title: Ley número 4 (Aprobada el 23 de junio de 1971 y subsiguientemente enmendada)