RT Book T1 The open token economy system: a handbook for a behavioral approach to rehabilitation A1 Welch, Michael W. A1 Gist, Jerre W. LA English PP Springfield, Ill. PB Thomas YR 1974 UL https://krimdok.uni-tuebingen.de/Record/1652018581 NO Mit Bibliogr SN 0398030790 K1 Verhaltenstherapie : Rehabilitation