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\bibitem{Gerstein_etal1994} Gerstein, D. R., Johnson, R. A., Harwood, H. J., Fountain, D., Suter, N., \& Malloy, K. (1994). \textit{Evaluating recovery services : the California drug and alcohol treatment assessment (CALDATA) : general report}  (N. O. R. Center, \& Lewin-VHI, Eds.). Sacramento: California Department of alcohol and Drug Programs.

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