References
- Curtis B., Simpson D. D., Joe G. W. Description of Drug Users Entering Treatment in the DARP during 1969–1973. IBR Report 74–8, Texas Christian Univ., Fort Worth 1974
- Sells S. B. Studies of the Effectiveness of Treatments for Drug Abuse. Ballinger, Cambridge, Massachusetts 1974, 2 vols
- Simpson D. D. Pretreatment Drug Use by Patients Entering Drug Treatment Programs during 1971–1973. Texas Christian Univ., Fort Worth 1974a, IBR Report 74–5
- Simpson D. D. Use of alcohol by DARP patients in treatment for drug abuse: 1969–1971 admissions. Studies of the Effectiveness of Treatments for Drug Abuse. Vol. 2.Research on Patients, Treatments, and Outcomes, S. B. Sells. Ballinger, Cambridge, Massachusetts 1974, b
- Simpson D. D., Sells S. B. Patterns of multiple drug abuse: 1969–1971. Int. J. Addict 1974; 9(2)301–314