Study, Institute of Medicine (US) Committee for the Substance Abuse Coverage; Gerstein, Dean R.; Harwood, Henrick J. (1992), "A Century of American Narcotic Policy", Treating Drug Problems: Volume 2: Commissioned Papers on Historical, Institutional, and Economic Contexts of Drug Treatment, National Academies Press (US), retrieved 2024-08-19
Study, Institute of Medicine (US) Committee for the Substance Abuse Coverage; Gerstein, Dean R.; Harwood, Henrick J. (1992), "A Century of American Narcotic Policy", Treating Drug Problems: Volume 2: Commissioned Papers on Historical, Institutional, and Economic Contexts of Drug Treatment, National Academies Press (US), retrieved 2024-08-19
Study, Institute of Medicine (US) Committee for the Substance Abuse Coverage; Gerstein, Dean R.; Harwood, Henrick J. (1992), "A Century of American Narcotic Policy", Treating Drug Problems: Volume 2: Commissioned Papers on Historical, Institutional, and Economic Contexts of Drug Treatment, National Academies Press (US), retrieved 2024-08-23