Effective treatment of homeless substance abusers
The role of contingency management
Schumacher, JE., Milby, JB., McNamara, CL., Wallace, D., Michael, M., Popkin, S., & Usdan, S. (1999). Effective treatment of homeless substance abusers: The role of contingency management. In ST. Higgins, & K. Silverman (Eds.), Motivation Behavior Change Among Illicit-Drug Abusers: Research on Contingency Managment Interventions American Psychological Association.
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