References
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- Spiegel D. K., Sells S. B. Evaluation of treatments for drug users in the DARP: 1969-1971 admissions, in The Effectiveness of Drug Abuse Treatment. Evaluation of Treatments, S. B. Sells. Ballinger, Cambridge, Massachusetts 1974; 1
- Gorsuch R. L., Abbamonte M., Sells S. B. Evaluation of treatments for drug users in the DARP: 1971-1972 admissions, in The Effectiveness of Drug Abuse Treatment. Evaluation of Treatment Outcomes for the 1971-72 Admission Cohort, S. B. Sells, D. D. Simpson. Ballinger, Cambridge, Massachusetts. 1976; 4
- Gorsuch R. L., Butler M. C., Sells S. B. Evaluation of treatments for drug users in the DARP: 1972-1973 admissions, in The Effectiveness of Drug Abuse Treatment. Evaluation of Treatment Outcomes for the 1972-73 Admission Cohort, S. B. Sells, D. D. Simpson. Ballinger, Cambridge, Massachusetts. 1976; 5
- Sells S. B. Methadone maintenance in perspective. J. Drug Issues 1977; 7: 13–22
- Savage L. J., Simpson D. D. Measures of Illicit Drug Use: National Follow-up Study of Admissions to Drug Abuse Treatments in the DARP during 1969-1971 (IBR Report 76-14). Institute of Behavioral Research. Texas Christian University, Ft Worth, Texas 1976
- Sells S. B., et al. A national follow-up study to evaluate the effectiveness of drug abuse treatment: A report on cohort 1 of the DARP five years later. Am. J. Drug Alcohol Abuse 1976; 3: 545–556
- National Institute on Drug Abuse. A Report of Follow-up Studies Conducted with Former Clients of Drug Treatment Programs in New York City, Washington D.C. Services Research Monograph Series, Rockville, Maryland 1977
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- Nie N. H., et al. SPSS Statistical Package for the Social Sciences, 2nd ed. McGraw-Hill, New York 1975