Johnston, Lloyd D; Nurco, David; Robins, Lee N. (1977). Conducting followup research on drug treatment programs. Treatment program monograph series ;; no. 2; DHEW publication ;; no. (ADM) 77-487; Variation: United States.; Dept. of Health, Education, and Welfare.; DHEW publication ;; no. (ADM) 77-487.; Treatment program monograph series ;; no 2.. 191.